diff --git a/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/CompoundTag.java b/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/CompoundTag.java
index 9c2f00f..e6aadb3 100644
--- a/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/CompoundTag.java
+++ b/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/CompoundTag.java
@@ -3,7 +3,7 @@
 import java.util.Set;
 import java.util.UUID;
 
-public interface CompoundTag {
+public interface CompoundTag extends Cloneable {
 
     boolean containsKey(String name);
 
@@ -17,6 +17,8 @@ public interface CompoundTag {
 
     void size();
 
+    void merge(CompoundTag source);
+
     CompoundTag getCompound(String name);
 
     CompoundTag getCompound(String name, boolean createIfMissing);
@@ -96,4 +98,6 @@ public interface CompoundTag {
 
     @Override
     boolean equals(Object obj);
+
+    public CompoundTag clone();
 }
\ No newline at end of file
diff --git a/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/ListTag.java b/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/ListTag.java
index dc14dd9..160b4ed 100644
--- a/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/ListTag.java
+++ b/nmsutils-core/src/main/java/de/cubeside/nmsutils/nbt/ListTag.java
@@ -2,7 +2,7 @@
 
 import java.util.UUID;
 
-public interface ListTag {
+public interface ListTag extends Cloneable {
     int size();
 
     boolean isEmpty();
@@ -134,4 +134,6 @@ public interface ListTag {
     boolean addUUID(int index, UUID v);
 
     boolean setUUID(int index, UUID v);
+
+    public ListTag clone();
 }
diff --git a/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/CompoundTagImpl.java b/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/CompoundTagImpl.java
index cc2128f..08c7060 100644
--- a/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/CompoundTagImpl.java
+++ b/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/CompoundTagImpl.java
@@ -51,6 +51,11 @@ public void size() {
         handle.size();
     }
 
+    @Override
+    public void merge(de.cubeside.nmsutils.nbt.CompoundTag source) {
+        handle.merge(((CompoundTagImpl) source).handle);
+    }
+
     @Override
     public CompoundTagImpl getCompound(String name) {
         return getCompound(name, false);
@@ -309,4 +314,9 @@ public int hashCode() {
     public boolean equals(Object obj) {
         return obj instanceof CompoundTagImpl o && handle.equals(o.handle);
     }
+
+    @Override
+    public CompoundTagImpl clone() {
+        return new CompoundTagImpl(handle.copy());
+    }
 }
diff --git a/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/ListTagImpl.java b/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/ListTagImpl.java
index 9e1dfaa..2fba9b0 100644
--- a/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/ListTagImpl.java
+++ b/nmsutils-v1_19_R3/src/main/java/de/cubeside/nmsutils/v1_19_R3/ListTagImpl.java
@@ -414,4 +414,9 @@ public int hashCode() {
     public boolean equals(Object obj) {
         return obj instanceof ListTagImpl o && handle.equals(o.handle);
     }
+
+    @Override
+    public ListTagImpl clone() {
+        return new ListTagImpl(handle.copy());
+    }
 }
diff --git a/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/CompoundTagImpl.java b/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/CompoundTagImpl.java
index 67f0958..7cdcb8f 100644
--- a/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/CompoundTagImpl.java
+++ b/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/CompoundTagImpl.java
@@ -51,6 +51,11 @@ public void size() {
         handle.size();
     }
 
+    @Override
+    public void merge(de.cubeside.nmsutils.nbt.CompoundTag source) {
+        handle.merge(((CompoundTagImpl) source).handle);
+    }
+
     @Override
     public CompoundTagImpl getCompound(String name) {
         return getCompound(name, false);
@@ -309,4 +314,9 @@ public int hashCode() {
     public boolean equals(Object obj) {
         return obj instanceof CompoundTagImpl o && handle.equals(o.handle);
     }
+
+    @Override
+    public CompoundTagImpl clone() {
+        return new CompoundTagImpl(handle.copy());
+    }
 }
diff --git a/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/ListTagImpl.java b/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/ListTagImpl.java
index 69cec13..1f35579 100644
--- a/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/ListTagImpl.java
+++ b/nmsutils-v1_20_R1/src/main/java/de/cubeside/nmsutils/v1_20_R1/ListTagImpl.java
@@ -414,4 +414,9 @@ public int hashCode() {
     public boolean equals(Object obj) {
         return obj instanceof ListTagImpl o && handle.equals(o.handle);
     }
+
+    @Override
+    public ListTagImpl clone() {
+        return new ListTagImpl(handle.copy());
+    }
 }