diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65a778f..6d6920c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ENHANCEMENTS:
 
-* Supports `dynamic` block for `tags` and `labels`
+* Supports `dynamic` block for `tags`, `labels` and `regions_config`
 
 ## 1.0.0 (Mar 6, 2025)
 
diff --git a/README.md b/README.md
index 71e0378..69fd104 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,8 @@ Given the different ways of using dynamic blocks, we recommend reviewing the out
 
 #### Dynamic blocks in tags and labels
 
-You can use `dynamic` blocks for `tags` and `labels`. You can also combine the use of dynamic blocks in `tags` and `labels` with individual blocks in the same cluster definition, e.g.:
+You can use `dynamic` blocks for `tags` and `labels`. The plugin assumes that `for_each` has an expression which is evaluated to a `map` of strings.
+You can also combine the use of dynamic blocks in `tags` and `labels` with individual blocks in the same cluster definition, e.g.:
 ```hcl
 tags {
 	key   = "environment"
@@ -72,12 +73,37 @@ dynamic "tags" {
 }
 ```
 
+#### Dynamic blocks in regions_config
+
+You can use `dynamic` blocks for `regions_config`. The plugin assumes that `for_each` has an expression which is evaluated to a `list` or `set` of objects.
+This is an example of how to use dynamic blocks in `regions_config`:
+```hcl
+  replication_specs {
+    num_shards = var.replication_specs.num_shards
+    zone_name  = var.replication_specs.zone_name # only needed if you're using zones
+    dynamic "regions_config" {
+      for_each = var.replication_specs.regions_config
+      content {
+        priority        = regions_config.value.priority
+        region_name     = regions_config.value.region_name
+        electable_nodes = regions_config.value.electable_nodes
+        read_only_nodes = regions_config.value.read_only_nodes
+      }
+    }
+  }
+```
+Dynamic block and individual blocks for `regions_config` are not supported at the same time. If you need this use case, please send us [feedback](https://github.com/mongodb-labs/atlas-cli-plugin-terraform/issues). There are currently two main approaches to handle this:
+- (Recommended) Remove the individual `regions_config` blocks and add their information to the variable you're using in the `for_each` expression, e.g. using [concat](https://developer.hashicorp.com/terraform/language/functions/concat) if you're using a list or [setunion](https://developer.hashicorp.com/terraform/language/functions/setunion) for sets. In this way, you don't need to change the generated `mongodb_advanced_cluster` configuration.
+- Change the generated `mongodb_advanced_cluster` configuration to join the individual blocks to the code generated for the `dynamic` block. This approach is more error-prone.
+
 ### Limitations
 
-- The plugin doesn't support `regions_config` without `electable_nodes` as there can be some issues with `priority` when they only have `analytics_nodes` and/or `electable_nodes`.
-- [`priority`](https://registry.terraform.io/providers/mongodb/mongodbatlas/latest/docs/resources/cluster#priority-1) is required in `regions_config` and must be a numeric [literal expression](https://developer.hashicorp.com/nomad/docs/job-specification/hcl2/expressions#literal-expressions) between 7 and 1, e.g. `var.priority` is not supported. This is to allow reordering them by descending priority as this is expected in `mongodbatlas_advanced_cluster`.
-- [`num_shards`](https://registry.terraform.io/providers/mongodb/mongodbatlas/latest/docs/resources/cluster#num_shards-2) in `replication_specs` must be a numeric [literal expression](https://developer.hashicorp.com/nomad/docs/job-specification/hcl2/expressions#literal-expressions), e.g. `var.num_shards` is not supported. This is to allow creating a `replication_specs` element per shard in `mongodbatlas_advanced_cluster`.
-- `dynamic` blocks are currently supported only for `tags` and `labels`. **Coming soon**: support for `replication_specs` and `regions_config`.
+- [`num_shards`](https://registry.terraform.io/providers/mongodb/mongodbatlas/latest/docs/resources/cluster#num_shards-2) in `replication_specs` must be a numeric [literal expression](https://developer.hashicorp.com/nomad/docs/job-specification/hcl2/expressions#literal-expressions), e.g. `var.num_shards` is not supported. This is to allow creating a `replication_specs` element per shard in `mongodbatlas_advanced_cluster`. This limitation doesn't apply if you're using `dynamic` blocks in `regions_config` or `replication_specs`.
+- `dynamic` blocks are currently supported only for `tags`, `labels` and `regions_config`. See limitations for `regions_config` support in [its section](#dynamic-blocks-in-regions_config) above. **Coming soon**: support for `replication_specs`.
+
+## Feedback
+
+If you find any issues or have any suggestions, please open an [issue](https://github.com/mongodb-labs/atlas-cli-plugin-terraform/issues) in this repository.
 
 ## Contributing
 
diff --git a/internal/convert/const_names.go b/internal/convert/const_names.go
index 7352d18..c2adc20 100644
--- a/internal/convert/const_names.go
+++ b/internal/convert/const_names.go
@@ -54,4 +54,5 @@ const (
 	nDynamic                    = "dynamic"
 	nForEach                    = "for_each"
 	nContent                    = "content"
+	nRegion                     = "region"
 )
diff --git a/internal/convert/convert.go b/internal/convert/convert.go
index 74ff298..8482b2c 100644
--- a/internal/convert/convert.go
+++ b/internal/convert/convert.go
@@ -22,22 +22,22 @@ const (
 	advClusterPlural = "mongodbatlas_advanced_clusters"
 	valClusterType   = "REPLICASET"
 	valMaxPriority   = 7
-	valMinPriority   = 1
-
-	errFreeCluster = "free cluster (because no " + nRepSpecs + ")"
-	errRepSpecs    = "setting " + nRepSpecs
-	errConfigs     = "setting " + nConfig
-	errPriority    = "setting " + nPriority
-	errNumShards   = "setting " + nNumShards
+	valMinPriority   = 0
+	errFreeCluster   = "free cluster (because no " + nRepSpecs + ")"
+	errRepSpecs      = "setting " + nRepSpecs
+	errConfigs       = "setting " + nConfig
+	errPriority      = "setting " + nPriority
+	errNumShards     = "setting " + nNumShards
 
 	commentGeneratedBy       = "Generated by atlas-cli-plugin-terraform."
-	commentConfirmReferences = "Please confirm that all references to this resource are updated."
+	commentConfirmReferences = "Please review the changes and confirm that references to this resource are updated."
 	commentMovedBlock        = "Moved blocks"
 	commentRemovedOld        = "Note: Remember to remove or comment out the old cluster definitions."
+	commentPriorityFor       = "Regions must be sorted by priority in descending order."
 )
 
 var (
-	dynamicBlockAllowList = []string{nTags, nLabels}
+	dynamicBlockAllowList = []string{nTags, nLabels, nConfigSrc}
 )
 
 type attrVals struct {
@@ -129,8 +129,8 @@ func fillMovedBlocks(body *hclwrite.Body, moveLabels []string) {
 	for i, moveLabel := range moveLabels {
 		block := body.AppendNewBlock(nMoved, nil)
 		blockb := block.Body()
-		hcl.SetAttrExpr(blockb, nFrom, fmt.Sprintf("%s.%s", cluster, moveLabel))
-		hcl.SetAttrExpr(blockb, nTo, fmt.Sprintf("%s.%s", advCluster, moveLabel))
+		blockb.SetAttributeRaw(nFrom, hcl.TokensFromExpr(fmt.Sprintf("%s.%s", cluster, moveLabel)))
+		blockb.SetAttributeRaw(nTo, hcl.TokensFromExpr(fmt.Sprintf("%s.%s", advCluster, moveLabel)))
 		if i < len(moveLabels)-1 {
 			body.AppendNewline()
 		}
@@ -202,9 +202,15 @@ func fillReplicationSpecs(resourceb *hclwrite.Body, root attrVals) error {
 			break
 		}
 		specbSrc := specSrc.Body()
-		if err := checkDynamicBlock(specbSrc); err != nil {
+		d, err := fillReplicationSpecsWithDynamicRegionConfigs(specbSrc, root)
+		if err != nil {
 			return err
 		}
+		if d.IsPresent() {
+			resourceb.RemoveBlock(specSrc)
+			resourceb.SetAttributeRaw(nRepSpecs, d.tokens)
+			return nil
+		}
 		// ok to fail as zone_name is optional
 		_ = hcl.MoveAttr(specbSrc, specb, nZoneName, nZoneName, errRepSpecs)
 		shards := specbSrc.GetAttribute(nNumShards)
@@ -251,7 +257,7 @@ func fillTagsLabelsOpt(resourceb *hclwrite.Body, name string) error {
 
 func extractTagsLabelsDynamicBlock(resourceb *hclwrite.Body, name string) (hclwrite.Tokens, error) {
 	d, err := getDynamicBlock(resourceb, name)
-	if err != nil || d.forEach == nil {
+	if err != nil || !d.IsPresent() {
 		return nil, err
 	}
 	key := d.content.Body().GetAttribute(nKey)
@@ -306,6 +312,36 @@ func fillBlockOpt(resourceb *hclwrite.Body, name string) {
 	resourceb.SetAttributeRaw(name, hcl.TokensObject(block.Body()))
 }
 
+// fillReplicationSpecsWithDynamicRegionConfigs is used for dynamic blocks in region_configs
+func fillReplicationSpecsWithDynamicRegionConfigs(specbSrc *hclwrite.Body, root attrVals) (dynamicBlock, error) {
+	d, err := getDynamicBlock(specbSrc, nConfigSrc)
+	if err != nil || !d.IsPresent() {
+		return dynamicBlock{}, err
+	}
+	repSpec := hclwrite.NewEmptyFile()
+	repSpecb := repSpec.Body()
+	if zoneName := hcl.GetAttrExpr(specbSrc.GetAttribute(nZoneName)); zoneName != "" {
+		repSpecb.SetAttributeRaw(nZoneName, hcl.TokensFromExpr(zoneName))
+	}
+	regionFor, err := getDynamicBlockRegionConfigsRegionArray(d, root)
+	if err != nil {
+		return dynamicBlock{}, err
+	}
+	priorityFor := hcl.TokensComment(commentPriorityFor)
+	priorityFor = append(priorityFor, hcl.TokensFromExpr(fmt.Sprintf("for %s in range(%d, %d, -1) : ", nPriority, valMaxPriority, valMinPriority))...)
+	priorityFor = append(priorityFor, regionFor...)
+	repSpecb.SetAttributeRaw(nConfig, hcl.TokensFuncFlatten(priorityFor))
+
+	shards := specbSrc.GetAttribute(nNumShards)
+	if shards == nil {
+		return dynamicBlock{}, fmt.Errorf("%s: %s not found", errRepSpecs, nNumShards)
+	}
+	tokens := hcl.TokensFromExpr(fmt.Sprintf("for i in range(%s) :", hcl.GetAttrExpr(shards)))
+	tokens = append(tokens, hcl.EncloseBraces(repSpec.BuildTokens(nil), true)...)
+	d.tokens = hcl.EncloseBracketsNewLines(tokens)
+	return d, nil
+}
+
 func fillRegionConfigs(specb, specbSrc *hclwrite.Body, root attrVals) error {
 	var configs []*hclwrite.Body
 	for {
@@ -313,7 +349,7 @@ func fillRegionConfigs(specb, specbSrc *hclwrite.Body, root attrVals) error {
 		if configSrc == nil {
 			break
 		}
-		config, err := getRegionConfig(configSrc, root)
+		config, err := getRegionConfig(configSrc, root, false)
 		if err != nil {
 			return err
 		}
@@ -323,34 +359,28 @@ func fillRegionConfigs(specb, specbSrc *hclwrite.Body, root attrVals) error {
 	if len(configs) == 0 {
 		return fmt.Errorf("%s: %s not found", errRepSpecs, nConfigSrc)
 	}
-	sort.Slice(configs, func(i, j int) bool {
-		pi, _ := hcl.GetAttrInt(configs[i].GetAttribute(nPriority), errPriority)
-		pj, _ := hcl.GetAttrInt(configs[j].GetAttribute(nPriority), errPriority)
-		return pi > pj
-	})
+	configs = sortConfigsByPriority(configs)
 	specb.SetAttributeRaw(nConfig, hcl.TokensArray(configs))
 	return nil
 }
 
-func getRegionConfig(configSrc *hclwrite.Block, root attrVals) (*hclwrite.File, error) {
+func getRegionConfig(configSrc *hclwrite.Block, root attrVals, isDynamicBlock bool) (*hclwrite.File, error) {
 	file := hclwrite.NewEmptyFile()
 	fileb := file.Body()
 	fileb.SetAttributeRaw(nProviderName, root.req[nProviderName])
 	if err := hcl.MoveAttr(configSrc.Body(), fileb, nRegionName, nRegionName, errRepSpecs); err != nil {
 		return nil, err
 	}
-	if err := setPriority(fileb, configSrc.Body().GetAttribute(nPriority)); err != nil {
+	if err := hcl.MoveAttr(configSrc.Body(), fileb, nPriority, nPriority, errRepSpecs); err != nil {
 		return nil, err
 	}
-	electableSpecs, errElec := getSpecs(configSrc, nElectableNodes, root)
-	if errElec != nil {
-		return nil, errElec
+	if electable, _ := getSpecs(configSrc, nElectableNodes, root, isDynamicBlock); electable != nil {
+		fileb.SetAttributeRaw(nElectableSpecs, electable)
 	}
-	fileb.SetAttributeRaw(nElectableSpecs, electableSpecs)
-	if readOnly, _ := getSpecs(configSrc, nReadOnlyNodes, root); readOnly != nil {
+	if readOnly, _ := getSpecs(configSrc, nReadOnlyNodes, root, isDynamicBlock); readOnly != nil {
 		fileb.SetAttributeRaw(nReadOnlySpecs, readOnly)
 	}
-	if analytics, _ := getSpecs(configSrc, nAnalyticsNodes, root); analytics != nil {
+	if analytics, _ := getSpecs(configSrc, nAnalyticsNodes, root, isDynamicBlock); analytics != nil {
 		fileb.SetAttributeRaw(nAnalyticsSpecs, analytics)
 	}
 	if autoScaling := getAutoScalingOpt(root.opt); autoScaling != nil {
@@ -359,7 +389,7 @@ func getRegionConfig(configSrc *hclwrite.Block, root attrVals) (*hclwrite.File,
 	return file, nil
 }
 
-func getSpecs(configSrc *hclwrite.Block, countName string, root attrVals) (hclwrite.Tokens, error) {
+func getSpecs(configSrc *hclwrite.Block, countName string, root attrVals, isDynamicBlock bool) (hclwrite.Tokens, error) {
 	var (
 		file  = hclwrite.NewEmptyFile()
 		fileb = file.Body()
@@ -382,7 +412,11 @@ func getSpecs(configSrc *hclwrite.Block, countName string, root attrVals) (hclwr
 	if root.opt[nDiskIOPSSrc] != nil {
 		fileb.SetAttributeRaw(nDiskIOPS, root.opt[nDiskIOPSSrc])
 	}
-	return hcl.TokensObject(fileb), nil
+	tokens := hcl.TokensObject(fileb)
+	if isDynamicBlock {
+		tokens = encloseDynamicBlockRegionSpec(tokens, countName)
+	}
+	return tokens, nil
 }
 
 func getAutoScalingOpt(opt map[string]hclwrite.Tokens) hclwrite.Tokens {
@@ -440,6 +474,17 @@ func getResourceLabel(resource *hclwrite.Block) string {
 	return labels[1]
 }
 
+type dynamicBlock struct {
+	block   *hclwrite.Block
+	forEach *hclwrite.Attribute
+	content *hclwrite.Block
+	tokens  hclwrite.Tokens
+}
+
+func (d dynamicBlock) IsPresent() bool {
+	return d.block != nil
+}
+
 func checkDynamicBlock(body *hclwrite.Body) error {
 	for _, block := range body.Blocks() {
 		name := getResourceName(block)
@@ -451,12 +496,6 @@ func checkDynamicBlock(body *hclwrite.Body) error {
 	return nil
 }
 
-type dynamicBlock struct {
-	block   *hclwrite.Block
-	forEach *hclwrite.Attribute
-	content *hclwrite.Block
-}
-
 func getDynamicBlock(body *hclwrite.Body, name string) (dynamicBlock, error) {
 	for _, block := range body.Blocks() {
 		if block.Type() != nDynamic || name != getResourceName(block) {
@@ -481,6 +520,55 @@ func replaceDynamicBlockExpr(attr *hclwrite.Attribute, blockName, attrName strin
 	return strings.ReplaceAll(expr, fmt.Sprintf("%s.%s", blockName, attrName), attrName)
 }
 
+func encloseDynamicBlockRegionSpec(specTokens hclwrite.Tokens, countName string) hclwrite.Tokens {
+	tokens := hcl.TokensFromExpr(fmt.Sprintf("%s.%s > 0 ?", nRegion, countName))
+	tokens = append(tokens, specTokens...)
+	return append(tokens, hcl.TokensFromExpr(": null")...)
+}
+
+// getDynamicBlockRegionConfigsRegionArray returns the region array for a dynamic block in replication_specs.
+// e.g. [ for region in var.replication_specs.regions_config : { ... } if priority == region.priority ]
+func getDynamicBlockRegionConfigsRegionArray(d dynamicBlock, root attrVals) (hclwrite.Tokens, error) {
+	transformDynamicBlockReferences(d.content.Body())
+	priorityStr := hcl.GetAttrExpr(d.content.Body().GetAttribute(nPriority))
+	if priorityStr == "" {
+		return nil, fmt.Errorf("%s: %s not found", errRepSpecs, nPriority)
+	}
+	region, err := getRegionConfig(d.content, root, true)
+	if err != nil {
+		return nil, err
+	}
+	tokens := hcl.TokensFromExpr(fmt.Sprintf("for %s in %s :", nRegion, hcl.GetAttrExpr(d.forEach)))
+	tokens = append(tokens, hcl.EncloseBraces(region.BuildTokens(nil), true)...)
+	tokens = append(tokens, hcl.TokensFromExpr(fmt.Sprintf("if %s == %s", nPriority, priorityStr))...)
+	return hcl.EncloseBracketsNewLines(tokens), nil
+}
+
+// transformDynamicBlockReferences changes value references in all attributes, e.g. regions_config.value.electable_nodes to region.electable_nodes
+func transformDynamicBlockReferences(configSrcb *hclwrite.Body) {
+	for name, attr := range configSrcb.Attributes() {
+		expr := hcl.GetAttrExpr(attr)
+		expr = strings.ReplaceAll(expr,
+			fmt.Sprintf("%s.%s.", nConfigSrc, nValue),
+			fmt.Sprintf("%s.", nRegion))
+		configSrcb.SetAttributeRaw(name, hcl.TokensFromExpr(expr))
+	}
+}
+
+func sortConfigsByPriority(configs []*hclwrite.Body) []*hclwrite.Body {
+	for _, config := range configs {
+		if _, err := hcl.GetAttrInt(config.GetAttribute(nPriority), errPriority); err != nil {
+			return configs // don't sort priorities if any is not a numerical literal
+		}
+	}
+	sort.Slice(configs, func(i, j int) bool {
+		pi, _ := hcl.GetAttrInt(configs[i].GetAttribute(nPriority), errPriority)
+		pj, _ := hcl.GetAttrInt(configs[j].GetAttribute(nPriority), errPriority)
+		return pi > pj
+	})
+	return configs
+}
+
 func setKeyValue(body *hclwrite.Body, key, value *hclwrite.Attribute) {
 	keyStr, err := hcl.GetAttrString(key, "")
 	if err == nil {
@@ -494,21 +582,6 @@ func setKeyValue(body *hclwrite.Body, key, value *hclwrite.Attribute) {
 	body.SetAttributeRaw(keyStr, value.Expr().BuildTokens(nil))
 }
 
-func setPriority(body *hclwrite.Body, priority *hclwrite.Attribute) error {
-	if priority == nil {
-		return fmt.Errorf("%s: %s not found", errRepSpecs, nPriority)
-	}
-	valPriority, err := hcl.GetAttrInt(priority, errPriority)
-	if err != nil {
-		return err
-	}
-	if valPriority < valMinPriority || valPriority > valMaxPriority {
-		return fmt.Errorf("%s: %s is %d but must be between %d and %d", errPriority, nPriority, valPriority, valMinPriority, valMaxPriority)
-	}
-	hcl.SetAttrInt(body, nPriority, valPriority)
-	return nil
-}
-
 // popRootAttrs deletes the attributes common to all replication_specs/regions_config and returns them.
 func popRootAttrs(body *hclwrite.Body) (attrVals, error) {
 	var (
diff --git a/internal/convert/testdata/clu2adv/adv_config_bi_connector_pinned_fcv.out.tf b/internal/convert/testdata/clu2adv/adv_config_bi_connector_pinned_fcv.out.tf
index 603b42f..f1f7239 100644
--- a/internal/convert/testdata/clu2adv/adv_config_bi_connector_pinned_fcv.out.tf
+++ b/internal/convert/testdata/clu2adv/adv_config_bi_connector_pinned_fcv.out.tf
@@ -32,5 +32,5 @@ resource "mongodbatlas_advanced_cluster" "this" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/analytics_read_only_all_params.in.tf b/internal/convert/testdata/clu2adv/analytics_read_only_all_params.in.tf
index 101c90e..8d4a84b 100644
--- a/internal/convert/testdata/clu2adv/analytics_read_only_all_params.in.tf
+++ b/internal/convert/testdata/clu2adv/analytics_read_only_all_params.in.tf
@@ -18,3 +18,24 @@ resource "mongodbatlas_cluster" "ar" {
     }
   }
 }
+
+resource "mongodbatlas_cluster" "ar_not_electable" {
+  project_id                  = var.project_id
+  name                        = "ar"
+  cluster_type                = "REPLICASET"
+  provider_name               = "AWS"
+  provider_instance_size_name = "M10"
+  disk_size_gb                = 90
+  provider_volume_type        = "PROVISIONED"
+  provider_disk_iops          = 100
+  replication_specs {
+    num_shards = 1
+    regions_config {
+      region_name     = "US_EAST_1"
+      priority        = 7
+      electable_nodes = 0
+      analytics_nodes = 2
+      read_only_nodes = 1
+    }
+  }
+}
diff --git a/internal/convert/testdata/clu2adv/analytics_read_only_all_params.out.tf b/internal/convert/testdata/clu2adv/analytics_read_only_all_params.out.tf
index b8f0db7..85b8eef 100644
--- a/internal/convert/testdata/clu2adv/analytics_read_only_all_params.out.tf
+++ b/internal/convert/testdata/clu2adv/analytics_read_only_all_params.out.tf
@@ -36,5 +36,39 @@ resource "mongodbatlas_advanced_cluster" "ar" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
+}
+
+resource "mongodbatlas_advanced_cluster" "ar_not_electable" {
+  project_id   = var.project_id
+  name         = "ar"
+  cluster_type = "REPLICASET"
+  replication_specs = [
+    {
+      region_configs = [
+        {
+          provider_name = "AWS"
+          region_name   = "US_EAST_1"
+          priority      = 7
+          read_only_specs = {
+            node_count      = 1
+            instance_size   = "M10"
+            disk_size_gb    = 90
+            ebs_volume_type = "PROVISIONED"
+            disk_iops       = 100
+          }
+          analytics_specs = {
+            node_count      = 2
+            instance_size   = "M10"
+            disk_size_gb    = 90
+            ebs_volume_type = "PROVISIONED"
+            disk_iops       = 100
+          }
+        }
+      ]
+    }
+  ]
+
+  # Generated by atlas-cli-plugin-terraform.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/analytics_read_only_min_params.in.tf b/internal/convert/testdata/clu2adv/analytics_read_only_min_params.in.tf
index 8aae1e1..d3b4cab 100644
--- a/internal/convert/testdata/clu2adv/analytics_read_only_min_params.in.tf
+++ b/internal/convert/testdata/clu2adv/analytics_read_only_min_params.in.tf
@@ -15,3 +15,20 @@ resource "mongodbatlas_cluster" "ar" {
     }
   }
 }
+
+resource "mongodbatlas_cluster" "ar_not_electable" {
+  project_id                  = var.project_id
+  name                        = "ar"
+  cluster_type                = "REPLICASET"
+  provider_name               = "AWS"
+  provider_instance_size_name = "M10"
+  replication_specs {
+    num_shards = 1
+    regions_config {
+      region_name     = "US_EAST_1"
+      priority        = 7
+      analytics_nodes = 2
+      read_only_nodes = 1
+    }
+  }
+}
diff --git a/internal/convert/testdata/clu2adv/analytics_read_only_min_params.out.tf b/internal/convert/testdata/clu2adv/analytics_read_only_min_params.out.tf
index cb8c9ea..2699ea9 100644
--- a/internal/convert/testdata/clu2adv/analytics_read_only_min_params.out.tf
+++ b/internal/convert/testdata/clu2adv/analytics_read_only_min_params.out.tf
@@ -27,5 +27,33 @@ resource "mongodbatlas_advanced_cluster" "ar" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
+}
+
+resource "mongodbatlas_advanced_cluster" "ar_not_electable" {
+  project_id   = var.project_id
+  name         = "ar"
+  cluster_type = "REPLICASET"
+  replication_specs = [
+    {
+      region_configs = [
+        {
+          provider_name = "AWS"
+          region_name   = "US_EAST_1"
+          priority      = 7
+          read_only_specs = {
+            node_count    = 1
+            instance_size = "M10"
+          }
+          analytics_specs = {
+            node_count    = 2
+            instance_size = "M10"
+          }
+        }
+      ]
+    }
+  ]
+
+  # Generated by atlas-cli-plugin-terraform.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/autoscaling.out.tf b/internal/convert/testdata/clu2adv/autoscaling.out.tf
index c1bbddb..97ab2e6 100644
--- a/internal/convert/testdata/clu2adv/autoscaling.out.tf
+++ b/internal/convert/testdata/clu2adv/autoscaling.out.tf
@@ -36,5 +36,5 @@ resource "mongodbatlas_advanced_cluster" "autoscaling" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/data_sources.out.tf b/internal/convert/testdata/clu2adv/data_sources.out.tf
index fb8561d..2ba949f 100644
--- a/internal/convert/testdata/clu2adv/data_sources.out.tf
+++ b/internal/convert/testdata/clu2adv/data_sources.out.tf
@@ -6,7 +6,7 @@ data "mongodbatlas_advanced_cluster" "singular" {
   use_replication_spec_per_shard = true
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 data "mongodbatlas_advanced_clusters" "plural" {
@@ -15,7 +15,7 @@ data "mongodbatlas_advanced_clusters" "plural" {
   use_replication_spec_per_shard = true
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 data "mongodbatlas_advanced_cluster" "adv_singular" {
diff --git a/internal/convert/testdata/clu2adv/dynamic_regions_config_auto_scaling.in.tf b/internal/convert/testdata/clu2adv/dynamic_regions_config_auto_scaling.in.tf
new file mode 100644
index 0000000..bbc64bc
--- /dev/null
+++ b/internal/convert/testdata/clu2adv/dynamic_regions_config_auto_scaling.in.tf
@@ -0,0 +1,67 @@
+resource "mongodbatlas_cluster" "cluster" {
+  project_id                     = var.project_id
+  name                           = var.cluster_name
+  cloud_backup                   = var.backup_enabled
+  pit_enabled                    = var.pit_enabled
+  retain_backups_enabled         = var.retain_backups_enabled
+  auto_scaling_disk_gb_enabled   = var.auto_scaling_disk_gb_enabled
+  mongo_db_major_version         = var.mongodb_version
+  cluster_type                   = var.cluster_type
+  termination_protection_enabled = var.termination_protection_enabled
+  num_shards                     = var.replication_specs.num_shards
+  paused                         = var.paused
+  disk_size_gb                   = var.disk_size_gb
+  provider_volume_type           = var.provider_volume_type
+  provider_disk_iops             = var.provider_disk_iops
+  redact_client_log_data         = true
+  provider_name                  = var.provider_name
+  provider_instance_size_name    = var.provider_instance_size_name
+  encryption_at_rest_provider    = var.encryption_at_rest_provider
+
+  replication_specs {
+    num_shards = var.replication_specs.num_shards
+    dynamic "regions_config" {
+      for_each = var.replication_specs.regions_config
+      content {
+        region_name     = regions_config.value.region_name
+        electable_nodes = regions_config.value.electable_nodes
+        analytics_nodes = regions_config.value.analytics_nodes
+        priority        = regions_config.value.priority
+        read_only_nodes = regions_config.value.read_only_nodes
+      }
+    }
+  }
+
+  advanced_configuration {
+    oplog_size_mb                      = var.oplog_size_mb
+    transaction_lifetime_limit_seconds = var.transaction_lifetime_limit_seconds
+    minimum_enabled_tls_protocol       = "TLS1_2"
+    javascript_enabled                 = false
+    tls_cipher_config_mode             = "CUSTOM"
+    custom_openssl_cipher_config_tls12 = ["TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"]
+  }
+
+  labels {
+    key   = "label1"
+    value = var.label1val
+  }
+  dynamic "labels" {
+    for_each = local.labels
+    content {
+      key   = labels.key
+      value = labels.value
+    }
+  }
+
+  tags {
+    key   = "tag1"
+    value = var.tag1val
+  }
+  dynamic "tags" {
+    for_each = local.tags
+    content {
+      key   = tags.key
+      value = replace(tags.value, "/", "_")
+    }
+  }
+}
diff --git a/internal/convert/testdata/clu2adv/dynamic_regions_config_auto_scaling.out.tf b/internal/convert/testdata/clu2adv/dynamic_regions_config_auto_scaling.out.tf
new file mode 100644
index 0000000..62bbd5f
--- /dev/null
+++ b/internal/convert/testdata/clu2adv/dynamic_regions_config_auto_scaling.out.tf
@@ -0,0 +1,80 @@
+resource "mongodbatlas_advanced_cluster" "cluster" {
+  project_id                     = var.project_id
+  name                           = var.cluster_name
+  pit_enabled                    = var.pit_enabled
+  retain_backups_enabled         = var.retain_backups_enabled
+  mongo_db_major_version         = var.mongodb_version
+  cluster_type                   = var.cluster_type
+  termination_protection_enabled = var.termination_protection_enabled
+  paused                         = var.paused
+  redact_client_log_data         = true
+  encryption_at_rest_provider    = var.encryption_at_rest_provider
+
+
+
+
+  backup_enabled = var.backup_enabled
+  replication_specs = [
+    for i in range(var.replication_specs.num_shards) : {
+      region_configs = flatten([
+        # Regions must be sorted by priority in descending order.
+        for priority in range(7, 0, -1) : [
+          for region in var.replication_specs.regions_config : {
+            provider_name = var.provider_name
+            region_name   = region.region_name
+            priority      = region.priority
+            electable_specs = region.electable_nodes > 0 ? {
+              node_count      = region.electable_nodes
+              instance_size   = var.provider_instance_size_name
+              disk_size_gb    = var.disk_size_gb
+              ebs_volume_type = var.provider_volume_type
+              disk_iops       = var.provider_disk_iops
+            } : null
+            read_only_specs = region.read_only_nodes > 0 ? {
+              node_count      = region.read_only_nodes
+              instance_size   = var.provider_instance_size_name
+              disk_size_gb    = var.disk_size_gb
+              ebs_volume_type = var.provider_volume_type
+              disk_iops       = var.provider_disk_iops
+            } : null
+            analytics_specs = region.analytics_nodes > 0 ? {
+              node_count      = region.analytics_nodes
+              instance_size   = var.provider_instance_size_name
+              disk_size_gb    = var.disk_size_gb
+              ebs_volume_type = var.provider_volume_type
+              disk_iops       = var.provider_disk_iops
+            } : null
+            auto_scaling = {
+              disk_gb_enabled = var.auto_scaling_disk_gb_enabled
+            }
+          } if priority == region.priority
+        ]
+      ])
+    }
+  ]
+  tags = merge(
+    {
+      for key, value in local.tags : key => replace(value, "/", "_")
+    },
+    {
+      tag1 = var.tag1val
+    }
+  )
+  labels = merge(
+    local.labels,
+    {
+      label1 = var.label1val
+    }
+  )
+  advanced_configuration = {
+    oplog_size_mb                      = var.oplog_size_mb
+    transaction_lifetime_limit_seconds = var.transaction_lifetime_limit_seconds
+    minimum_enabled_tls_protocol       = "TLS1_2"
+    javascript_enabled                 = false
+    tls_cipher_config_mode             = "CUSTOM"
+    custom_openssl_cipher_config_tls12 = ["TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"]
+  }
+
+  # Generated by atlas-cli-plugin-terraform.
+  # Please review the changes and confirm that references to this resource are updated.
+}
diff --git a/internal/convert/testdata/clu2adv/dynamic_regions_config_basic.in.tf b/internal/convert/testdata/clu2adv/dynamic_regions_config_basic.in.tf
new file mode 100644
index 0000000..5c5265b
--- /dev/null
+++ b/internal/convert/testdata/clu2adv/dynamic_regions_config_basic.in.tf
@@ -0,0 +1,50 @@
+resource "mongodbatlas_cluster" "dynamic_regions_config" {
+  project_id                  = var.project_id
+  name                        = "cluster"
+  cluster_type                = "SHARDED"
+  provider_name               = "AWS"
+  provider_instance_size_name = "M10"
+  replication_specs {
+    num_shards = var.replication_specs.num_shards
+    zone_name  = var.zone_name
+    dynamic "regions_config" {
+      for_each = var.replication_specs.regions_config
+      content {
+        region_name     = regions_config.value.region_name
+        electable_nodes = regions_config.value.electable_nodes
+        priority        = regions_config.value.prio
+        read_only_nodes = regions_config.value.read_only_nodes
+      }
+    }
+  }
+}
+
+# example of variable for demostration purposes, not used in the conversion
+variable "replication_specs" {
+  type = object({
+    num_shards = number
+    regions_config = set(object({
+      region_name     = string
+      electable_nodes = number
+      prio            = number
+      read_only_nodes = number
+    }))
+  })
+  default = {
+    num_shards = 3
+    regions_config = [
+      {
+        region_name     = "US_EAST_1"
+        electable_nodes = 3
+        prio            = 7
+        read_only_nodes = 0
+      },
+      {
+        region_name     = "US_WEST_2"
+        electable_nodes = 2
+        prio            = 6
+        read_only_nodes = 1
+      }
+    ]
+  }
+}
diff --git a/internal/convert/testdata/clu2adv/dynamic_regions_config_basic.out.tf b/internal/convert/testdata/clu2adv/dynamic_regions_config_basic.out.tf
new file mode 100644
index 0000000..a2f1050
--- /dev/null
+++ b/internal/convert/testdata/clu2adv/dynamic_regions_config_basic.out.tf
@@ -0,0 +1,61 @@
+resource "mongodbatlas_advanced_cluster" "dynamic_regions_config" {
+  project_id   = var.project_id
+  name         = "cluster"
+  cluster_type = "SHARDED"
+  replication_specs = [
+    for i in range(var.replication_specs.num_shards) : {
+      zone_name = var.zone_name
+      region_configs = flatten([
+        # Regions must be sorted by priority in descending order.
+        for priority in range(7, 0, -1) : [
+          for region in var.replication_specs.regions_config : {
+            provider_name = "AWS"
+            region_name   = region.region_name
+            priority      = region.prio
+            electable_specs = region.electable_nodes > 0 ? {
+              node_count    = region.electable_nodes
+              instance_size = "M10"
+            } : null
+            read_only_specs = region.read_only_nodes > 0 ? {
+              node_count    = region.read_only_nodes
+              instance_size = "M10"
+            } : null
+          } if priority == region.prio
+        ]
+      ])
+    }
+  ]
+
+  # Generated by atlas-cli-plugin-terraform.
+  # Please review the changes and confirm that references to this resource are updated.
+}
+
+# example of variable for demostration purposes, not used in the conversion
+variable "replication_specs" {
+  type = object({
+    num_shards = number
+    regions_config = set(object({
+      region_name     = string
+      electable_nodes = number
+      prio            = number
+      read_only_nodes = number
+    }))
+  })
+  default = {
+    num_shards = 3
+    regions_config = [
+      {
+        region_name     = "US_EAST_1"
+        electable_nodes = 3
+        prio            = 7
+        read_only_nodes = 0
+      },
+      {
+        region_name     = "US_WEST_2"
+        electable_nodes = 2
+        prio            = 6
+        read_only_nodes = 1
+      }
+    ]
+  }
+}
diff --git a/internal/convert/testdata/clu2adv/dynamic_tags_labels.out.tf b/internal/convert/testdata/clu2adv/dynamic_tags_labels.out.tf
index 3e78a8f..471ccf7 100644
--- a/internal/convert/testdata/clu2adv/dynamic_tags_labels.out.tf
+++ b/internal/convert/testdata/clu2adv/dynamic_tags_labels.out.tf
@@ -20,7 +20,7 @@ resource "mongodbatlas_advanced_cluster" "simplified" {
   tags = var.tags
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "expression" {
@@ -47,7 +47,7 @@ resource "mongodbatlas_advanced_cluster" "expression" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "simplified_individual" {
@@ -78,7 +78,7 @@ resource "mongodbatlas_advanced_cluster" "simplified_individual" {
   )
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "expression_individual" {
@@ -111,7 +111,7 @@ resource "mongodbatlas_advanced_cluster" "expression_individual" {
   )
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "full_example" {
@@ -157,5 +157,5 @@ resource "mongodbatlas_advanced_cluster" "full_example" {
   )
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/errors.json b/internal/convert/testdata/clu2adv/errors.json
index 7a04706..fc81442 100644
--- a/internal/convert/testdata/clu2adv/errors.json
+++ b/internal/convert/testdata/clu2adv/errors.json
@@ -3,12 +3,8 @@
 	"free_cluster_missing_attribute": "free cluster (because no replication_specs): attribute backing_provider_name not found",
 	"autoscaling_missing_attribute": "setting replication_specs: attribute provider_instance_size_name not found",
 	"replication_specs_missing_regions_config": "setting replication_specs: regions_config not found",
-	"regions_config_missing_electable_nodes": "setting replication_specs: attribute electable_nodes not found",
-	"regions_config_missing_priority": "setting replication_specs: priority not found",
-	"regions_config_out_of_range_priority": "setting priority: priority is 0 but must be between 1 and 7",
-	"regions_config_non_literal_priority": "setting priority: failed to evaluate number",
+	"regions_config_missing_priority": "setting replication_specs: attribute priority not found",
 	"replication_specs_unsupported_dynamic": "dynamic blocks are not supported",
-	"regions_config_unsupported_dynamic": "dynamic blocks are not supported",
 	"replication_specs_non_literal_num_shards": "setting num_shards: failed to evaluate number",
 	"replication_specs_missing_num_shards": "num_shards not found"
 }
diff --git a/internal/convert/testdata/clu2adv/free_cluster_with_count.out.tf b/internal/convert/testdata/clu2adv/free_cluster_with_count.out.tf
index c24b56f..c7dbdbf 100644
--- a/internal/convert/testdata/clu2adv/free_cluster_with_count.out.tf
+++ b/internal/convert/testdata/clu2adv/free_cluster_with_count.out.tf
@@ -26,5 +26,5 @@ resource "mongodbatlas_advanced_cluster" "free_cluster" { # comment in the resou
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/includeMoved_multiple.out.tf b/internal/convert/testdata/clu2adv/includeMoved_multiple.out.tf
index 8a11ff4..436ca65 100644
--- a/internal/convert/testdata/clu2adv/includeMoved_multiple.out.tf
+++ b/internal/convert/testdata/clu2adv/includeMoved_multiple.out.tf
@@ -19,7 +19,7 @@ resource "mongodbatlas_advanced_cluster" "cluster1" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "cluster2" {
@@ -43,7 +43,7 @@ resource "mongodbatlas_advanced_cluster" "cluster2" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "count" {
@@ -69,7 +69,7 @@ resource "mongodbatlas_advanced_cluster" "count" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "forEach" {
@@ -95,7 +95,7 @@ resource "mongodbatlas_advanced_cluster" "forEach" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "another_resource" "another" {
diff --git a/internal/convert/testdata/clu2adv/includeMoved_single.out.tf b/internal/convert/testdata/clu2adv/includeMoved_single.out.tf
index 5a49d34..fc8c497 100644
--- a/internal/convert/testdata/clu2adv/includeMoved_single.out.tf
+++ b/internal/convert/testdata/clu2adv/includeMoved_single.out.tf
@@ -19,7 +19,7 @@ resource "mongodbatlas_advanced_cluster" "cluster" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 # Moved blocks
diff --git a/internal/convert/testdata/clu2adv/multi_region.out.tf b/internal/convert/testdata/clu2adv/multi_region.out.tf
index facda3c..b7bbd54 100644
--- a/internal/convert/testdata/clu2adv/multi_region.out.tf
+++ b/internal/convert/testdata/clu2adv/multi_region.out.tf
@@ -43,5 +43,5 @@ resource "mongodbatlas_advanced_cluster" "multi_region" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/multi_replicaction_specs.out.tf b/internal/convert/testdata/clu2adv/multi_replicaction_specs.out.tf
index 290011d..cbb3526 100644
--- a/internal/convert/testdata/clu2adv/multi_replicaction_specs.out.tf
+++ b/internal/convert/testdata/clu2adv/multi_replicaction_specs.out.tf
@@ -37,7 +37,7 @@ resource "mongodbatlas_advanced_cluster" "multirep" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "geo" {
@@ -124,5 +124,5 @@ resource "mongodbatlas_advanced_cluster" "geo" {
   ]
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/convert/testdata/clu2adv/regions_config_missing_electable_nodes.in.tf b/internal/convert/testdata/clu2adv/regions_config_missing_electable_nodes.in.tf
deleted file mode 100644
index f35c870..0000000
--- a/internal/convert/testdata/clu2adv/regions_config_missing_electable_nodes.in.tf
+++ /dev/null
@@ -1,17 +0,0 @@
-resource "mongodbatlas_cluster" "clu" {
-  project_id                  = "1234"
-  name                        = "clu"
-  cluster_type                = "REPLICASET"
-  provider_name               = "AWS"
-  provider_instance_size_name = "M10"
-
-  replication_specs {
-    num_shards = 1
-    regions_config {
-      # missing electable_nodes
-      region_name     = "US_WEST_2"
-      priority        = 7
-      read_only_nodes = 2
-    }
-  }
-}
diff --git a/internal/convert/testdata/clu2adv/regions_config_non_literal_priority.in.tf b/internal/convert/testdata/clu2adv/regions_config_non_literal_priority.in.tf
deleted file mode 100644
index 590febe..0000000
--- a/internal/convert/testdata/clu2adv/regions_config_non_literal_priority.in.tf
+++ /dev/null
@@ -1,16 +0,0 @@
-resource "mongodbatlas_cluster" "clu" {
-  project_id                  = "1234"
-  name                        = "clu"
-  cluster_type                = "REPLICASET"
-  provider_name               = "AWS"
-  provider_instance_size_name = "M10"
-
-  replication_specs {
-    num_shards = 1
-    regions_config {
-      region_name     = "US_WEST_2"
-      priority        = var.priority # unresolved
-      electable_nodes = 2
-    }
-  }
-}
diff --git a/internal/convert/testdata/clu2adv/regions_config_out_of_range_priority.in.tf b/internal/convert/testdata/clu2adv/regions_config_out_of_range_priority.in.tf
deleted file mode 100644
index e1fe04b..0000000
--- a/internal/convert/testdata/clu2adv/regions_config_out_of_range_priority.in.tf
+++ /dev/null
@@ -1,16 +0,0 @@
-resource "mongodbatlas_cluster" "clu" {
-  project_id                  = "1234"
-  name                        = "clu"
-  cluster_type                = "REPLICASET"
-  provider_name               = "AWS"
-  provider_instance_size_name = "M10"
-
-  replication_specs {
-    num_shards = 1
-    regions_config {
-      region_name     = "US_WEST_2"
-      priority        = 0 # range 1-7
-      electable_nodes = 2
-    }
-  }
-}
diff --git a/internal/convert/testdata/clu2adv/regions_config_unsupported_dynamic.in.tf b/internal/convert/testdata/clu2adv/regions_config_unsupported_dynamic.in.tf
deleted file mode 100644
index 7934936..0000000
--- a/internal/convert/testdata/clu2adv/regions_config_unsupported_dynamic.in.tf
+++ /dev/null
@@ -1,38 +0,0 @@
-resource "mongodbatlas_cluster" "dynamic_region" {
-  project_id                  = var.project_id
-  name                        = "dynamic"
-  num_shards                  = 1
-  cluster_type                = "REPLICASET"
-  provider_name               = "AWS"
-  provider_instance_size_name = "M10"
-
-  replication_specs {
-    num_shards = 1
-    dynamic "regions_config" {
-      for_each = {
-        US_WEST_2 = {
-          electable_nodes = 3
-          priority        = 6
-          read_only_nodes = 0
-        }
-        US_WEST_1 = {
-          electable_nodes = 1
-          priority        = 5
-          read_only_nodes = 0
-        }
-        US_EAST_1 = {
-          electable_nodes = 3
-          priority        = 7
-          read_only_nodes = 0
-        }
-      }
-      content {
-        region_name     = regions_config.key
-        electable_nodes = regions_config.value.electable_nodes
-        priority        = regions_config.value.priority
-        read_only_nodes = regions_config.value.read_only_nodes
-      }
-
-    }
-  }
-}
diff --git a/internal/convert/testdata/clu2adv/tags_labels_timeouts.out.tf b/internal/convert/testdata/clu2adv/tags_labels_timeouts.out.tf
index 94bf061..9127502 100644
--- a/internal/convert/testdata/clu2adv/tags_labels_timeouts.out.tf
+++ b/internal/convert/testdata/clu2adv/tags_labels_timeouts.out.tf
@@ -22,7 +22,7 @@ resource "mongodbatlas_advanced_cluster" "basictags" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "basictimeouts" {
@@ -49,7 +49,7 @@ resource "mongodbatlas_advanced_cluster" "basictimeouts" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 resource "mongodbatlas_advanced_cluster" "all" {
@@ -88,5 +88,5 @@ resource "mongodbatlas_advanced_cluster" "all" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/internal/hcl/hcl.go b/internal/hcl/hcl.go
index 46f661c..8b71cfb 100644
--- a/internal/hcl/hcl.go
+++ b/internal/hcl/hcl.go
@@ -31,14 +31,11 @@ func PopAttr(body *hclwrite.Body, attrName, errPrefix string) (hclwrite.Tokens,
 	return tokens, nil
 }
 
-// SetAttrExpr sets an attribute to an expression (possibly with interpolations) without quotes.
-func SetAttrExpr(body *hclwrite.Body, attrName, expresion string) {
-	tokens := hclwrite.Tokens{{Type: hclsyntax.TokenIdent, Bytes: []byte(expresion)}}
-	body.SetAttributeRaw(attrName, tokens)
-}
-
 // GetAttrExpr returns the expression of an attribute as a string.
 func GetAttrExpr(attr *hclwrite.Attribute) string {
+	if attr == nil {
+		return ""
+	}
 	return strings.TrimSpace(string(attr.Expr().BuildTokens(nil).Bytes()))
 }
 
@@ -85,14 +82,11 @@ func GetAttrString(attr *hclwrite.Attribute, errPrefix string) (string, error) {
 
 // TokensArray creates an array of objects.
 func TokensArray(bodies []*hclwrite.Body) hclwrite.Tokens {
-	ret := hclwrite.Tokens{tokenNewLine}
 	tokens := make([]hclwrite.Tokens, 0)
 	for i := range bodies {
 		tokens = append(tokens, TokensObject(bodies[i]))
 	}
-	ret = append(ret, joinTokens(tokens...)...)
-	ret = append(ret, tokenNewLine)
-	return encloseBrackets(ret)
+	return EncloseBracketsNewLines(joinTokens(tokens...))
 }
 
 // TokensArraySingle creates an array of one object.
@@ -104,7 +98,7 @@ func TokensArraySingle(body *hclwrite.Body) hclwrite.Tokens {
 func TokensObject(body *hclwrite.Body) hclwrite.Tokens {
 	tokens := hclwrite.Tokens{tokenNewLine}
 	tokens = append(tokens, RemoveLeadingNewline(body.BuildTokens(nil))...)
-	return encloseBraces(tokens)
+	return EncloseBraces(tokens, false)
 }
 
 // TokensFromExpr creates the tokens for an expression provided as a string.
@@ -114,19 +108,20 @@ func TokensFromExpr(expr string) hclwrite.Tokens {
 
 // TokensObjectFromExpr creates an object with an expression.
 func TokensObjectFromExpr(expr string) hclwrite.Tokens {
-	tokens := hclwrite.Tokens{tokenNewLine}
-	tokens = append(tokens, TokensFromExpr(expr)...)
-	tokens = append(tokens, tokenNewLine)
-	return encloseBraces(tokens)
+	return EncloseBraces(EncloseNewLines(TokensFromExpr(expr)), false)
 }
 
 // TokensFuncMerge creates the tokens for the HCL merge function.
 func TokensFuncMerge(tokens ...hclwrite.Tokens) hclwrite.Tokens {
-	params := hclwrite.Tokens{tokenNewLine}
-	params = append(params, joinTokens(tokens...)...)
-	params = append(params, tokenNewLine)
-	ret := hclwrite.Tokens{{Type: hclsyntax.TokenIdent, Bytes: []byte("merge")}}
-	return append(ret, encloseParens(params)...)
+	params := EncloseNewLines(joinTokens(tokens...))
+	ret := TokensFromExpr("merge")
+	return append(ret, EncloseParens(params)...)
+}
+
+// TokensFuncFlatten creates the tokens for the HCL flatten function.
+func TokensFuncFlatten(tokens hclwrite.Tokens) hclwrite.Tokens {
+	ret := TokensFromExpr("flatten")
+	return append(ret, EncloseParens(EncloseBracketsNewLines(tokens))...)
 }
 
 // RemoveLeadingNewline removes the first newline if it exists to make the output prettier.
@@ -139,10 +134,14 @@ func RemoveLeadingNewline(tokens hclwrite.Tokens) hclwrite.Tokens {
 
 // AppendComment adds a comment at the end of the body.
 func AppendComment(body *hclwrite.Body, comment string) {
-	tokens := hclwrite.Tokens{
+	body.AppendUnstructuredTokens(TokensComment(comment))
+}
+
+// TokensComment returns the tokens for a comment.
+func TokensComment(comment string) hclwrite.Tokens {
+	return hclwrite.Tokens{
 		&hclwrite.Token{Type: hclsyntax.TokenComment, Bytes: []byte("# " + comment + "\n")},
 	}
-	body.AppendUnstructuredTokens(tokens)
 }
 
 // GetParser returns a parser for the given config and checks HCL syntax is valid
@@ -154,39 +153,52 @@ func GetParser(config []byte) (*hclwrite.File, error) {
 	return parser, nil
 }
 
-var tokenNewLine = &hclwrite.Token{Type: hclsyntax.TokenNewline, Bytes: []byte("\n")}
-
 // joinTokens joins multiple tokens with commas and newlines.
 func joinTokens(tokens ...hclwrite.Tokens) hclwrite.Tokens {
 	ret := hclwrite.Tokens{}
 	for i := range tokens {
 		ret = append(ret, tokens[i]...)
 		if i < len(tokens)-1 {
-			ret = append(ret,
-				&hclwrite.Token{Type: hclsyntax.TokenComma, Bytes: []byte(",")},
-				tokenNewLine)
+			ret = append(ret, &hclwrite.Token{Type: hclsyntax.TokenComma, Bytes: []byte(",")}, tokenNewLine)
 		}
 	}
 	return ret
 }
 
-// encloseParens encloses tokens with parentheses, ( ).
-func encloseParens(tokens hclwrite.Tokens) hclwrite.Tokens {
+// EncloseParens encloses tokens with parentheses, ( ).
+func EncloseParens(tokens hclwrite.Tokens) hclwrite.Tokens {
 	ret := hclwrite.Tokens{{Type: hclsyntax.TokenOParen, Bytes: []byte("(")}}
 	ret = append(ret, tokens...)
 	return append(ret, &hclwrite.Token{Type: hclsyntax.TokenCParen, Bytes: []byte(")")})
 }
 
-// encloseBraces encloses tokens with curly braces, { }.
-func encloseBraces(tokens hclwrite.Tokens) hclwrite.Tokens {
+// EncloseBraces encloses tokens with curly braces, { }.
+func EncloseBraces(tokens hclwrite.Tokens, initialNewLine bool) hclwrite.Tokens {
 	ret := hclwrite.Tokens{{Type: hclsyntax.TokenOBrace, Bytes: []byte("{")}}
+	if initialNewLine {
+		ret = append(ret, tokenNewLine)
+	}
 	ret = append(ret, tokens...)
 	return append(ret, &hclwrite.Token{Type: hclsyntax.TokenCBrace, Bytes: []byte("}")})
 }
 
-// encloseBrackets encloses tokens with square brackets, [ ].
-func encloseBrackets(tokens hclwrite.Tokens) hclwrite.Tokens {
+// EncloseBrackets encloses tokens with square brackets, [ ].
+func EncloseBrackets(tokens hclwrite.Tokens) hclwrite.Tokens {
 	ret := hclwrite.Tokens{{Type: hclsyntax.TokenOBrack, Bytes: []byte("[")}}
 	ret = append(ret, tokens...)
 	return append(ret, &hclwrite.Token{Type: hclsyntax.TokenCBrack, Bytes: []byte("]")})
 }
+
+// EncloseNewLines encloses tokens with newlines at the beginning and end.
+func EncloseNewLines(tokens hclwrite.Tokens) hclwrite.Tokens {
+	ret := hclwrite.Tokens{tokenNewLine}
+	ret = append(ret, tokens...)
+	return append(ret, tokenNewLine)
+}
+
+// EncloseBracketsNewLines encloses tokens with square brackets and newlines, [ \n ... \n ].
+func EncloseBracketsNewLines(tokens hclwrite.Tokens) hclwrite.Tokens {
+	return EncloseBrackets(EncloseNewLines(tokens))
+}
+
+var tokenNewLine = &hclwrite.Token{Type: hclsyntax.TokenNewline, Bytes: []byte("\n")}
diff --git a/test/e2e/testdata/clu2adv.expected.tf b/test/e2e/testdata/clu2adv.expected.tf
index 684dafe..0544aee 100644
--- a/test/e2e/testdata/clu2adv.expected.tf
+++ b/test/e2e/testdata/clu2adv.expected.tf
@@ -22,5 +22,5 @@ resource "mongodbatlas_advanced_cluster" "cluster" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
diff --git a/test/e2e/testdata/clu2adv.expected_moved.tf b/test/e2e/testdata/clu2adv.expected_moved.tf
index 6ef84c3..5fbfb91 100644
--- a/test/e2e/testdata/clu2adv.expected_moved.tf
+++ b/test/e2e/testdata/clu2adv.expected_moved.tf
@@ -22,7 +22,7 @@ resource "mongodbatlas_advanced_cluster" "cluster" {
   }
 
   # Generated by atlas-cli-plugin-terraform.
-  # Please confirm that all references to this resource are updated.
+  # Please review the changes and confirm that references to this resource are updated.
 }
 
 # Moved blocks