Update c511002870.lua

Author: TheRazgriz

unofficial/c511002870.lua

@@ -125,7 +125,7 @@ function s.indesop(e,tp,eg,ep,ev,re,r,rp)
 			local e2=Effect.CreateEffect(c)
 			e2:SetType(EFFECT_TYPE_FIELD)
 			e2:SetCode(EFFECT_CHANGE_BATTLE_DAMAGE)
-			e2:etProperty(EFFECT_FLAG_PLAYER_TARGET)
+			e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
 			e2:SetTargetRange(1,0)
 			e2:SetValue(HALF_DAMAGE)
 			e2:SetReset(RESET_PHASE|PHASE_DAMAGE_CAL)