diff --git a/src/Builtin/HierarchyTag.cs b/src/Builtin/HierarchyTag.cs
deleted file mode 100644
index 9934c9a..0000000
--- a/src/Builtin/HierarchyTag.cs
+++ /dev/null
@@ -1,4 +0,0 @@
-namespace DCFApixels.DragonECS
-{
-    public struct ChildOf : IEcsTagComponent { }
-}
diff --git a/src/Builtin/HierarchyTag.cs.meta b/src/Builtin/HierarchyTag.cs.meta
deleted file mode 100644
index 3f79036..0000000
--- a/src/Builtin/HierarchyTag.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 1de8d8a49b0d49640847d1cec330fc4b
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/src/EcsGraph.cs b/src/EcsGraph.cs
index 3090133..2fb5134 100644
--- a/src/EcsGraph.cs
+++ b/src/EcsGraph.cs
@@ -272,5 +272,9 @@ namespace DCFApixels.DragonECS
             #endregion
         }
         #endregion
+
+        #region Other
+        public static implicit operator EcsGraph(SingletonMarker marker) { return marker.Builder.World.GetGraph(); }
+        #endregion
     }
 }
\ No newline at end of file