diff --git a/DragonECS.csproj b/DragonECS.csproj
index cb1670d..129c906 100644
--- a/DragonECS.csproj
+++ b/DragonECS.csproj
@@ -10,7 +10,7 @@
         <RootNamespace>DCFApixels.DragonECS</RootNamespace>
 
         <Title>DragonECS</Title>
-        <Version>0.8.37</Version>
+        <Version>0.8.39</Version>
         <Authors>DCFApixels</Authors>
         <Description>ECS Framework for Game Engines with C# and .Net Platform</Description>
         <Copyright>DCFApixels</Copyright>
diff --git a/package.json b/package.json
index 50d14d4..b811349 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "displayName": "DragonECS",
     "description": "C# Entity Component System Framework",
     "unity": "2020.3",
-    "version": "0.8.37",
+    "version": "0.8.39",
     "repository": {
         "type": "git",
         "url": "https://github.com/DCFApixels/DragonECS.git"
diff --git a/src/Builtin/Aspects.cs b/src/Builtin/Aspects.cs
index a04ea7a..708d64d 100644
--- a/src/Builtin/Aspects.cs
+++ b/src/Builtin/Aspects.cs
@@ -6,23 +6,14 @@ namespace DCFApixels.DragonECS
 
     public sealed class SingleAspect<TPool> : EcsAspect where TPool : IEcsPoolImplementation, new()
     {
-        public readonly TPool pool;
-        public SingleAspect(Builder b)
-        {
-            pool = b.IncludePool<TPool>();
-        }
+        public readonly TPool pool = CurrentBuilder.IncludePool<TPool>();
     }
     public sealed class CombinedAspect<A0, A1> : EcsAspect
-        where A0 : EcsAspect
-        where A1 : EcsAspect
+        where A0 : EcsAspect, new()
+        where A1 : EcsAspect, new()
     {
-        public readonly A0 a0;
-        public readonly A1 a1;
-        public CombinedAspect(Builder b)
-        {
-            a0 = b.Combine<A0>(0);
-            a1 = b.Combine<A1>(1);
-        }
+        public readonly A0 a0 = CurrentBuilder.Combine<A0>();
+        public readonly A1 a1 = CurrentBuilder.Combine<A1>();
         public void Deconstruct(out A0 a0, out A1 a1)
         {
             a0 = this.a0;
@@ -31,19 +22,13 @@ namespace DCFApixels.DragonECS
     }
 
     public sealed class CombinedAspect<A0, A1, A2> : EcsAspect
-        where A0 : EcsAspect
-        where A1 : EcsAspect
-        where A2 : EcsAspect
+        where A0 : EcsAspect, new()
+        where A1 : EcsAspect, new()
+        where A2 : EcsAspect, new()
     {
-        public readonly A0 a0;
-        public readonly A1 a1;
-        public readonly A2 a2;
-        public CombinedAspect(Builder b)
-        {
-            a0 = b.Combine<A0>(0);
-            a1 = b.Combine<A1>(1);
-            a2 = b.Combine<A2>(2);
-        }
+        public readonly A0 a0 = CurrentBuilder.Combine<A0>();
+        public readonly A1 a1 = CurrentBuilder.Combine<A1>();
+        public readonly A2 a2 = CurrentBuilder.Combine<A2>();
         public void Deconstruct(out A0 a0, out A1 a1, out A2 a2)
         {
             a0 = this.a0;
@@ -53,22 +38,15 @@ namespace DCFApixels.DragonECS
     }
 
     public sealed class CombinedAspect<A0, A1, A2, A3> : EcsAspect
-        where A0 : EcsAspect
-        where A1 : EcsAspect
-        where A2 : EcsAspect
-        where A3 : EcsAspect
+        where A0 : EcsAspect, new()
+        where A1 : EcsAspect, new()
+        where A2 : EcsAspect, new()
+        where A3 : EcsAspect, new()
     {
-        public readonly A0 a0;
-        public readonly A1 a1;
-        public readonly A2 a2;
-        public readonly A3 a3;
-        public CombinedAspect(Builder b)
-        {
-            a0 = b.Combine<A0>(0);
-            a1 = b.Combine<A1>(1);
-            a2 = b.Combine<A2>(2);
-            a3 = b.Combine<A3>(3);
-        }
+        public readonly A0 a0 = CurrentBuilder.Combine<A0>();
+        public readonly A1 a1 = CurrentBuilder.Combine<A1>();
+        public readonly A2 a2 = CurrentBuilder.Combine<A2>();
+        public readonly A3 a3 = CurrentBuilder.Combine<A3>();
         public void Deconstruct(out A0 a0, out A1 a1, out A2 a2, out A3 a3)
         {
             a0 = this.a0;
@@ -79,25 +57,17 @@ namespace DCFApixels.DragonECS
     }
 
     public sealed class CombinedAspect<A0, A1, A2, A3, A4> : EcsAspect
-        where A0 : EcsAspect
-        where A1 : EcsAspect
-        where A2 : EcsAspect
-        where A3 : EcsAspect
-        where A4 : EcsAspect
+        where A0 : EcsAspect, new()
+        where A1 : EcsAspect, new()
+        where A2 : EcsAspect, new()
+        where A3 : EcsAspect, new()
+        where A4 : EcsAspect, new()
     {
-        public readonly A0 a0;
-        public readonly A1 a1;
-        public readonly A2 a2;
-        public readonly A3 a3;
-        public readonly A4 a4;
-        public CombinedAspect(Builder b)
-        {
-            a0 = b.Combine<A0>(0);
-            a1 = b.Combine<A1>(1);
-            a2 = b.Combine<A2>(2);
-            a3 = b.Combine<A3>(3);
-            a4 = b.Combine<A4>(4);
-        }
+        public readonly A0 a0 = CurrentBuilder.Combine<A0>();
+        public readonly A1 a1 = CurrentBuilder.Combine<A1>();
+        public readonly A2 a2 = CurrentBuilder.Combine<A2>();
+        public readonly A3 a3 = CurrentBuilder.Combine<A3>();
+        public readonly A4 a4 = CurrentBuilder.Combine<A4>();
         public void Deconstruct(out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
         {
             a0 = this.a0;
@@ -109,28 +79,19 @@ namespace DCFApixels.DragonECS
     }
 
     public sealed class CombinedAspect<A0, A1, A2, A3, A4, A5> : EcsAspect
-        where A0 : EcsAspect
-        where A1 : EcsAspect
-        where A2 : EcsAspect
-        where A3 : EcsAspect
-        where A4 : EcsAspect
-        where A5 : EcsAspect
+        where A0 : EcsAspect, new()
+        where A1 : EcsAspect, new()
+        where A2 : EcsAspect, new()
+        where A3 : EcsAspect, new()
+        where A4 : EcsAspect, new()
+        where A5 : EcsAspect, new()
     {
-        public readonly A0 a0;
-        public readonly A1 a1;
-        public readonly A2 a2;
-        public readonly A3 a3;
-        public readonly A4 a4;
-        public readonly A5 a5;
-        public CombinedAspect(Builder b)
-        {
-            a0 = b.Combine<A0>(0);
-            a1 = b.Combine<A1>(1);
-            a2 = b.Combine<A2>(2);
-            a3 = b.Combine<A3>(3);
-            a4 = b.Combine<A4>(4);
-            a5 = b.Combine<A5>(5);
-        }
+        public readonly A0 a0 = CurrentBuilder.Combine<A0>();
+        public readonly A1 a1 = CurrentBuilder.Combine<A1>();
+        public readonly A2 a2 = CurrentBuilder.Combine<A2>();
+        public readonly A3 a3 = CurrentBuilder.Combine<A3>();
+        public readonly A4 a4 = CurrentBuilder.Combine<A4>();
+        public readonly A5 a5 = CurrentBuilder.Combine<A5>();
         public void Deconstruct(out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
         {
             a0 = this.a0;
@@ -146,21 +107,21 @@ namespace DCFApixels.DragonECS
     {
         #region Where 2
         public static EcsSpan Where<TCollection, A0, A1>(this TCollection entities, out A0 a0, out A1 a1)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().Where(out a0, out a1);
         }
         public static EcsSpan Where<A0, A1>(this EcsReadonlyGroup group, out A0 a0, out A1 a1)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
         {
             return group.ToSpan().Where(out a0, out a1);
         }
         public static EcsSpan Where<A0, A1>(this EcsSpan span, out A0 a0, out A1 a1)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
         {
             var result = span.Where(out CombinedAspect<A0, A1> combined);
             (a0, a1) = combined;
@@ -170,24 +131,24 @@ namespace DCFApixels.DragonECS
 
         #region Where 3
         public static EcsSpan Where<TCollection, A0, A1, A2>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().Where(out a0, out a1, out a2);
         }
         public static EcsSpan Where<A0, A1, A2>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
         {
             return group.ToSpan().Where(out a0, out a1, out a2);
         }
         public static EcsSpan Where<A0, A1, A2>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
         {
             var result = span.Where(out CombinedAspect<A0, A1, A2> combined);
             (a0, a1, a2) = combined;
@@ -197,27 +158,27 @@ namespace DCFApixels.DragonECS
 
         #region Where 4
         public static EcsSpan Where<TCollection, A0, A1, A2, A3>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2, out A3 a3)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().Where(out a0, out a1, out a2, out a3);
         }
         public static EcsSpan Where<A0, A1, A2, A3>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2, out A3 a3)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
         {
             return group.ToSpan().Where(out a0, out a1, out a2, out a3);
         }
         public static EcsSpan Where<A0, A1, A2, A3>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2, out A3 a3)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
         {
             var result = span.Where(out CombinedAspect<A0, A1, A2, A3> combined);
             (a0, a1, a2, a3) = combined;
@@ -227,30 +188,30 @@ namespace DCFApixels.DragonECS
 
         #region Where 5
         public static EcsSpan Where<TCollection, A0, A1, A2, A3, A4>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().Where(out a0, out a1, out a2, out a3, out a4);
         }
         public static EcsSpan Where<A0, A1, A2, A3, A4>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
         {
             return group.ToSpan().Where(out a0, out a1, out a2, out a3, out a4);
         }
         public static EcsSpan Where<A0, A1, A2, A3, A4>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
         {
             var result = span.Where(out CombinedAspect<A0, A1, A2, A3, A4> combined);
             (a0, a1, a2, a3, a4) = combined;
@@ -260,33 +221,33 @@ namespace DCFApixels.DragonECS
 
         #region Where 6
         public static EcsSpan Where<TCollection, A0, A1, A2, A3, A4, A5>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
-            where A5 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
+            where A5 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().Where(out a0, out a1, out a2, out a3, out a4, out a5);
         }
         public static EcsSpan Where<A0, A1, A2, A3, A4, A5>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
-            where A5 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
+            where A5 : EcsAspect, new()
         {
             return group.ToSpan().Where(out a0, out a1, out a2, out a3, out a4, out a5);
         }
         public static EcsSpan Where<A0, A1, A2, A3, A4, A5>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
-            where A5 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
+            where A5 : EcsAspect, new()
         {
             var result = span.Where(out CombinedAspect<A0, A1, A2, A3, A4, A5> combined);
             (a0, a1, a2, a3, a4, a5) = combined;
@@ -296,21 +257,21 @@ namespace DCFApixels.DragonECS
 
         #region WhereToGroup 2
         public static EcsReadonlyGroup WhereToGroup<TCollection, A0, A1>(this TCollection entities, out A0 a0, out A1 a1)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().WhereToGroup(out a0, out a1);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1>(this EcsReadonlyGroup group, out A0 a0, out A1 a1)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
         {
             return group.ToSpan().WhereToGroup(out a0, out a1);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1>(this EcsSpan span, out A0 a0, out A1 a1)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
         {
             var result = span.WhereToGroup(out CombinedAspect<A0, A1> combined);
             (a0, a1) = combined;
@@ -320,24 +281,24 @@ namespace DCFApixels.DragonECS
 
         #region WhereToGroup 3
         public static EcsReadonlyGroup WhereToGroup<TCollection, A0, A1, A2>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().WhereToGroup(out a0, out a1, out a2);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
         {
             return group.ToSpan().WhereToGroup(out a0, out a1, out a2);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
         {
             var result = span.WhereToGroup(out CombinedAspect<A0, A1, A2> combined);
             (a0, a1, a2) = combined;
@@ -347,27 +308,27 @@ namespace DCFApixels.DragonECS
 
         #region WhereToGroup 4
         public static EcsReadonlyGroup WhereToGroup<TCollection, A0, A1, A2, A3>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2, out A3 a3)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().WhereToGroup(out a0, out a1, out a2, out a3);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2, A3>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2, out A3 a3)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
         {
             return group.ToSpan().WhereToGroup(out a0, out a1, out a2, out a3);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2, A3>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2, out A3 a3)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
         {
             var result = span.WhereToGroup(out CombinedAspect<A0, A1, A2, A3> combined);
             (a0, a1, a2, a3) = combined;
@@ -377,30 +338,30 @@ namespace DCFApixels.DragonECS
 
         #region WhereToGroup 5
         public static EcsReadonlyGroup WhereToGroup<TCollection, A0, A1, A2, A3, A4>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().WhereToGroup(out a0, out a1, out a2, out a3, out a4);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2, A3, A4>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
         {
             return group.ToSpan().WhereToGroup(out a0, out a1, out a2, out a3, out a4);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2, A3, A4>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
         {
             var result = span.WhereToGroup(out CombinedAspect<A0, A1, A2, A3, A4> combined);
             (a0, a1, a2, a3, a4) = combined;
@@ -410,33 +371,33 @@ namespace DCFApixels.DragonECS
 
         #region WhereToGroup 6
         public static EcsReadonlyGroup WhereToGroup<TCollection, A0, A1, A2, A3, A4, A5>(this TCollection entities, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
-            where A5 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
+            where A5 : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().WhereToGroup(out a0, out a1, out a2, out a3, out a4, out a5);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2, A3, A4, A5>(this EcsReadonlyGroup group, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
-            where A5 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
+            where A5 : EcsAspect, new()
         {
             return group.ToSpan().WhereToGroup(out a0, out a1, out a2, out a3, out a4, out a5);
         }
         public static EcsReadonlyGroup WhereToGroup<A0, A1, A2, A3, A4, A5>(this EcsSpan span, out A0 a0, out A1 a1, out A2 a2, out A3 a3, out A4 a4, out A5 a5)
-            where A0 : EcsAspect
-            where A1 : EcsAspect
-            where A2 : EcsAspect
-            where A3 : EcsAspect
-            where A4 : EcsAspect
-            where A5 : EcsAspect
+            where A0 : EcsAspect, new()
+            where A1 : EcsAspect, new()
+            where A2 : EcsAspect, new()
+            where A3 : EcsAspect, new()
+            where A4 : EcsAspect, new()
+            where A5 : EcsAspect, new()
         {
             var result = span.WhereToGroup(out CombinedAspect<A0, A1, A2, A3, A4, A5> combined);
             (a0, a1, a2, a3, a4, a5) = combined;
diff --git a/src/EcsAspect.cs b/src/EcsAspect.cs
index f285ee4..656f8b8 100644
--- a/src/EcsAspect.cs
+++ b/src/EcsAspect.cs
@@ -2,7 +2,6 @@
 using DCFApixels.DragonECS.PoolsCore;
 using System;
 using System.Collections.Generic;
-using System.Reflection;
 using System.Runtime.CompilerServices;
 
 namespace DCFApixels.DragonECS
@@ -23,7 +22,18 @@ namespace DCFApixels.DragonECS
             }
             return _constructorBuildersStack;
         }
-
+        protected static Builder CurrentBuilder
+        {
+            get
+            {
+                var buildersStack = GetBuildersStack();
+                if (buildersStack.Count <= 0)
+                {
+                    Throw.Aspect_CanOnlyBeUsedDuringInitialization(nameof(CurrentBuilder));
+                }
+                return buildersStack.Peek();
+            }
+        }
         protected static IncludeMarker Inc
         {
             get
@@ -94,6 +104,7 @@ namespace DCFApixels.DragonECS
         {
             private EcsWorld _world;
             private EcsMask.Builder _maskBuilder;
+
             public IncludeMarker Inc
             {
                 get { return new IncludeMarker(this); }
@@ -114,28 +125,16 @@ namespace DCFApixels.DragonECS
                 _world = world;
                 _maskBuilder = EcsMask.New(world);
             }
-            internal static unsafe TAspect New<TAspect>(EcsWorld world) where TAspect : EcsAspect
+            internal static unsafe TAspect New<TAspect>(EcsWorld world) where TAspect : EcsAspect, new()
             {
                 Builder builder = new Builder(world);
                 Type aspectType = typeof(TAspect);
                 EcsAspect newAspect;
-                //TODO добавить оповещение что инициализация через конструктор не работает
-#if !REFLECTION_DISABLED
-                ConstructorInfo constructorInfo = aspectType.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, new Type[] { typeof(Builder) }, null);
 
                 var buildersStack = GetBuildersStack();
                 buildersStack.Push(builder);
-                if (constructorInfo != null)
-                {
-                    newAspect = (EcsAspect)constructorInfo.Invoke(new object[] { builder });
-                }
-                else
-#endif
-                {
-#pragma warning disable IL2091 // Target generic argument does not satisfy 'DynamicallyAccessedMembersAttribute' in target method or type. The generic parameter of the source method or type does not have matching annotations.
-                    newAspect = Activator.CreateInstance<TAspect>();
-#pragma warning restore IL2091
-                }
+
+                newAspect = new TAspect();
                 newAspect.Init(builder);
                 buildersStack.Pop();
                 newAspect._source = world;
@@ -193,13 +192,13 @@ namespace DCFApixels.DragonECS
             {
                 _maskBuilder.Exclude(type);
             }
-            public TOtherAspect Combine<TOtherAspect>(int order = 0) where TOtherAspect : EcsAspect
+            public TOtherAspect Combine<TOtherAspect>(int order = 0) where TOtherAspect : EcsAspect, new()
             {
                 var result = _world.GetAspect<TOtherAspect>();
                 _maskBuilder.Combine(result.Mask);
                 return result;
             }
-            public TOtherAspect Except<TOtherAspect>(int order = 0) where TOtherAspect : EcsAspect
+            public TOtherAspect Except<TOtherAspect>(int order = 0) where TOtherAspect : EcsAspect, new()
             {
                 var result = _world.GetAspect<TOtherAspect>();
                 _maskBuilder.Except(result.Mask);
diff --git a/src/EcsWorld.cache.cs b/src/EcsWorld.cache.cs
index d6cd397..57ad1ab 100644
--- a/src/EcsWorld.cache.cs
+++ b/src/EcsWorld.cache.cs
@@ -19,7 +19,7 @@ namespace DCFApixels.DragonECS
             }
         }
         internal readonly struct AspectCache<T> : IEcsWorldComponent<AspectCache<T>>
-            where T : EcsAspect
+            where T : EcsAspect, new()
         {
             public readonly T instance;
             public AspectCache(T instance) => this.instance = instance;
diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index c6c48f4..8e63f57 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -211,7 +211,7 @@ namespace DCFApixels.DragonECS
         [UnityEngine.Scripting.Preserve]
 #endif
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public TAspect GetAspect<TAspect>() where TAspect : EcsAspect
+        public TAspect GetAspect<TAspect>() where TAspect : EcsAspect, new()
         {
             return Get<AspectCache<TAspect>>().instance;
         }
diff --git a/src/Executors/EcsWhereExecutor.cs b/src/Executors/EcsWhereExecutor.cs
index 38a981b..47d43ab 100644
--- a/src/Executors/EcsWhereExecutor.cs
+++ b/src/Executors/EcsWhereExecutor.cs
@@ -7,7 +7,7 @@ namespace DCFApixels.DragonECS
     [Il2CppSetOption(Option.NullChecks, false)]
     [Il2CppSetOption(Option.ArrayBoundsChecks, false)]
 #endif
-    public sealed class EcsWhereExecutor<TAspect> : EcsQueryExecutor where TAspect : EcsAspect
+    public sealed class EcsWhereExecutor<TAspect> : EcsQueryExecutor where TAspect : EcsAspect, new()
     {
         private TAspect _aspect;
         private int[] _filteredEntities;
diff --git a/src/Executors/EcsWhereToGroupExecutor.cs b/src/Executors/EcsWhereToGroupExecutor.cs
index 196face..f275cfe 100644
--- a/src/Executors/EcsWhereToGroupExecutor.cs
+++ b/src/Executors/EcsWhereToGroupExecutor.cs
@@ -7,7 +7,7 @@ namespace DCFApixels.DragonECS
     [Il2CppSetOption(Option.NullChecks, false)]
     [Il2CppSetOption(Option.ArrayBoundsChecks, false)]
 #endif
-    public sealed class EcsWhereToGroupExecutor<TAspect> : EcsQueryExecutor where TAspect : EcsAspect
+    public sealed class EcsWhereToGroupExecutor<TAspect> : EcsQueryExecutor where TAspect : EcsAspect, new()
     {
         private TAspect _aspect;
         private EcsGroup _filteredGroup;
diff --git a/src/Executors/Queries.cs b/src/Executors/Queries.cs
index afa4efb..9e3f9ee 100644
--- a/src/Executors/Queries.cs
+++ b/src/Executors/Queries.cs
@@ -8,18 +8,18 @@
     {
         #region Where
         public static EcsSpan Where<TCollection, TAspect>(this TCollection entities, out TAspect aspect)
-            where TAspect : EcsAspect
+            where TAspect : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().Where(out aspect);
         }
         public static EcsSpan Where<TAspect>(this EcsReadonlyGroup group, out TAspect aspect)
-            where TAspect : EcsAspect
+            where TAspect : EcsAspect, new()
         {
             return group.ToSpan().Where(out aspect);
         }
         public static EcsSpan Where<TAspect>(this EcsSpan span, out TAspect aspect)
-            where TAspect : EcsAspect
+            where TAspect : EcsAspect, new()
         {
             EcsWorld world = span.World;
             if (world.IsEnableReleaseDelEntBuffer)
@@ -34,18 +34,18 @@
 
         #region WhereToGroup
         public static EcsReadonlyGroup WhereToGroup<TCollection, TAspect>(this TCollection entities, out TAspect aspect)
-            where TAspect : EcsAspect
+            where TAspect : EcsAspect, new()
             where TCollection : IEntityStorage
         {
             return entities.ToSpan().WhereToGroup(out aspect);
         }
         public static EcsReadonlyGroup WhereToGroup<TAspect>(this EcsReadonlyGroup group, out TAspect aspect)
-            where TAspect : EcsAspect
+            where TAspect : EcsAspect, new()
         {
             return group.ToSpan().WhereToGroup(out aspect);
         }
         public static EcsReadonlyGroup WhereToGroup<TAspect>(this EcsSpan span, out TAspect aspect)
-            where TAspect : EcsAspect
+            where TAspect : EcsAspect, new()
         {
             EcsWorld world = span.World;
             if (world.IsEnableReleaseDelEntBuffer)