diff --git a/SubstrateCS/Source/Chunk.cs b/SubstrateCS/Source/Chunk.cs
index 0a7ef25..f5fb8fe 100644
--- a/SubstrateCS/Source/Chunk.cs
+++ b/SubstrateCS/Source/Chunk.cs
@@ -173,7 +173,11 @@ namespace Substrate
 
             List<TileEntity> tileEntites = new List<TileEntity>();
             foreach (TagNodeCompound tag in _tileEntities) {
-                TileEntity te = TileEntity.FromTreeSafe(tag);
+                TileEntity te = TileEntityFactory.Create(tag);
+                if (te == null) {
+                    te = TileEntity.FromTreeSafe(tag);
+                }
+
                 if (te != null) {
                     te.MoveBy(diffx, 0, diffz);
                     tileEntites.Add(te);
diff --git a/SubstrateCS/Source/Entity.cs b/SubstrateCS/Source/Entity.cs
index c2901fc..99ee315 100644
--- a/SubstrateCS/Source/Entity.cs
+++ b/SubstrateCS/Source/Entity.cs
@@ -22,6 +22,8 @@ namespace Substrate
             new SchemaNodeScaler("OnGround", TagType.TAG_BYTE),
         };
 
+        private TagNodeCompound _source;
+
         private Vector3 _pos;
         private Vector3 _motion;
         private Orientation _rotation;
@@ -128,6 +130,10 @@ namespace Substrate
             _fire = e._fire;
             _air = e._air;
             _onGround = e._onGround;
+
+            if (e._source != null) {
+                _source = e._source.Copy() as TagNodeCompound;
+            }
         }
 
         /// <summary>
@@ -187,6 +193,8 @@ namespace Substrate
             _air = ctree["Air"].ToTagShort();
             _onGround = ctree["OnGround"].ToTagByte();
 
+            _source = ctree.Copy() as TagNodeCompound;
+
             return this;
         }
 
@@ -234,6 +242,10 @@ namespace Substrate
             tree["Air"] = new TagNodeShort(_air);
             tree["OnGround"] = new TagNodeByte(_onGround);
 
+            if (_source != null) {
+                tree.MergeFrom(_source);
+            }
+
             return tree;
         }
 
diff --git a/SubstrateCS/Source/Item.cs b/SubstrateCS/Source/Item.cs
index dafc6f0..2346259 100644
--- a/SubstrateCS/Source/Item.cs
+++ b/SubstrateCS/Source/Item.cs
@@ -18,6 +18,8 @@ namespace Substrate
             new SchemaNodeScaler("Count", TagType.TAG_BYTE),
         };
 
+        private TagNodeCompound _source;
+
         private short _id;
         private byte _count;
         private short _damage;
@@ -96,6 +98,10 @@ namespace Substrate
             item._count = _count;
             item._damage = _damage;
 
+            if (_source != null) {
+                item._source = _source.Copy() as TagNodeCompound;
+            }
+
             return item;
         }
 
@@ -115,6 +121,8 @@ namespace Substrate
             _count = ctree["Count"].ToTagByte();
             _damage = ctree["Damage"].ToTagShort();
 
+            _source = ctree.Copy() as TagNodeCompound;
+
             return this;
         }
 
@@ -136,6 +144,10 @@ namespace Substrate
             tree["Count"] = new TagNodeByte(_count);
             tree["Damage"] = new TagNodeShort(_damage);
 
+            if (_source != null) {
+                tree.MergeFrom(_source);
+            }
+
             return tree;
         }
 
diff --git a/SubstrateCS/Source/Level.cs b/SubstrateCS/Source/Level.cs
index f0fb4c4..aa9ab94 100644
--- a/SubstrateCS/Source/Level.cs
+++ b/SubstrateCS/Source/Level.cs
@@ -49,6 +49,8 @@ namespace Substrate
             },
         };
 
+        private TagNodeCompound _source;
+
         private NbtWorld _world;
 
         private long _time;
@@ -275,6 +277,10 @@ namespace Substrate
             if (p._player != null) {
                 _player = p._player.Copy();
             }
+
+            if (p._source != null) {
+                _source = p._source.Copy() as TagNodeCompound;
+            }
         }
 
         /// <summary>
@@ -388,6 +394,8 @@ namespace Substrate
                 _mapFeatures = ctree["MapFeatures"].ToTagByte();
             }
 
+            _source = ctree.Copy() as TagNodeCompound;
+
             return this;
         }
 
@@ -453,6 +461,10 @@ namespace Substrate
                 data["MapFeatures"] = new TagNodeByte(_mapFeatures ?? 0);
             }
 
+            if (_source != null) {
+                data.MergeFrom(_source);
+            }
+
             TagNodeCompound tree = new TagNodeCompound();
             tree.Add("Data", data);
 
diff --git a/SubstrateCS/Source/Nbt/TagNodeCompound.cs b/SubstrateCS/Source/Nbt/TagNodeCompound.cs
index 11b716a..3045f90 100644
--- a/SubstrateCS/Source/Nbt/TagNodeCompound.cs
+++ b/SubstrateCS/Source/Nbt/TagNodeCompound.cs
@@ -45,6 +45,21 @@ namespace Substrate.Nbt
             _tags = new Dictionary<string, TagNode>();
         }
 
+        /// <summary>
+        /// Copies all the elements of <paramref name="tree"/> into this <see cref="TagNodeCompound"/> if they do not already exist.
+        /// </summary>
+        /// <param name="tree">The source <see cref="TagNodeCompound"/> to copy elements from.</param>
+        public void MergeFrom (TagNodeCompound tree)
+        {
+            foreach (KeyValuePair<string, TagNode> node in tree) {
+                if (_tags.ContainsKey(node.Key)) {
+                    continue;
+                }
+
+                _tags.Add(node.Key, node.Value);
+            }
+        }
+
         /// <summary>
         /// Makes a deep copy of the node.
         /// </summary>
diff --git a/SubstrateCS/Source/TileEntity.cs b/SubstrateCS/Source/TileEntity.cs
index 00dd4d2..5fa3abb 100644
--- a/SubstrateCS/Source/TileEntity.cs
+++ b/SubstrateCS/Source/TileEntity.cs
@@ -20,6 +20,8 @@ namespace Substrate
             new SchemaNodeScaler("z", TagType.TAG_INT),
         };
 
+        private TagNodeCompound _source;
+
         private string _id;
         private int _x;
         private int _y;
@@ -60,6 +62,14 @@ namespace Substrate
             set { _z = value; }
         }
 
+        /// <summary>
+        /// Gets the source <see cref="TagNodeCompound"/> used to create this <see cref="TileEntity"/> if it exists.
+        /// </summary>
+        protected TagNodeCompound Source
+        {
+            get { return _source; }
+        }
+
         /// <summary>
         /// Constructs a blank <see cref="TileEntity"/>.
         /// </summary>
@@ -86,6 +96,10 @@ namespace Substrate
             _x = te._x;
             _y = te._y;
             _z = te._z;
+
+            if (te._source != null) {
+                _source = te._source.Copy() as TagNodeCompound;
+            }
         }
 
         /// <summary>
@@ -176,6 +190,8 @@ namespace Substrate
             _y = ctree["y"].ToTagInt();
             _z = ctree["z"].ToTagInt();
 
+            _source = ctree.Copy() as TagNodeCompound;
+
             return this;
         }
 
@@ -205,6 +221,10 @@ namespace Substrate
             tree["y"] = new TagNodeInt(_y);
             tree["z"] = new TagNodeInt(_z);
 
+            if (_source != null) {
+                tree.MergeFrom(_source);
+            }
+
             return tree;
         }
 
@@ -218,6 +238,8 @@ namespace Substrate
             return new NbtVerifier(tree, _schema).Verify();
         }
 
+
+
         #endregion
     }