diff --git a/Abilities.json b/Abilities.json
index 0b1af62..de39ade 100644
--- a/Abilities.json
+++ b/Abilities.json
@@ -18,11 +18,21 @@
     "anger_point": {
         "effect": "AngerPoint"
     },
-    "anticipation": {},
-    "arena_trap": {},
-    "aroma_veil": {},
-    "aura_break": {},
-    "bad_dreams": {},
+    "anticipation": {
+        "effect": "Anticipation"
+    },
+    "arena_trap": {
+        "effect": "ArenaTrap"
+    },
+    "aroma_veil": {
+        "effect": "AromaVeil"
+    },
+    "aura_break": {
+        "effect": "AuraBreal"
+    },
+    "bad_dreams": {
+        "effect": "BadDreams"
+    },
     "battery": {},
     "battle_armor": {},
     "battle_bond": {},
diff --git a/Moves.json b/Moves.json
index 7c24165..d12c890 100644
--- a/Moves.json
+++ b/Moves.json
@@ -2052,7 +2052,8 @@
         "protect",
         "reflectable",
         "mirror",
-        "ignore-substitute"
+        "ignore-substitute",
+        "limit_move_choice"
       ]
     },
     {
@@ -2635,7 +2636,8 @@
         "reflectable",
         "mirror",
         "ignore-substitute",
-        "mental"
+        "mental",
+        "limit_move_choice"
       ]
     },
     {
@@ -4068,7 +4070,8 @@
       "flags": [
         "protect",
         "reflectable",
-        "mirror"
+        "mirror",
+        "limit_move_choice"
       ]
     },
     {
@@ -9309,7 +9312,8 @@
         "reflectable",
         "mirror",
         "ignore-substitute",
-        "mental"
+        "mental",
+        "limit_move_choice"
       ]
     },
     {
@@ -9612,7 +9616,8 @@
         "reflectable",
         "mirror",
         "ignore-substitute",
-        "mental"
+        "mental",
+        "limit_move_choice"
       ]
     },
     {
diff --git a/Scripts/Abilities/ArenaTrap.as b/Scripts/Abilities/ArenaTrap.as
index 16adbcb..5c689ef 100644
--- a/Scripts/Abilities/ArenaTrap.as
+++ b/Scripts/Abilities/ArenaTrap.as
@@ -1,4 +1,5 @@
 namespace Gen7 {
+    [Ability effect=ArenaTrap]
     class ArenaTrap : PkmnScript {
         void PreventOpponentRunAway(FleeTurnChoice@ choice, bool &inout block){
             if (block) return;
diff --git a/Scripts/Abilities/AromaVeil.as b/Scripts/Abilities/AromaVeil.as
new file mode 100644
index 0000000..4a85159
--- /dev/null
+++ b/Scripts/Abilities/AromaVeil.as
@@ -0,0 +1,11 @@
+namespace Gen7 {
+    [Ability effect=AromaVeil]
+    class AromaVeil {
+        void PreventSecondaryEffects(ExecutingMove@ move, Pokemon@, uint8, bool &inout prevent){
+            // TODO: This only prevents disabling moves, not other things that block move uses.
+            if (move.UseMove.HasFlag("limit_move_choice")){
+                prevent = true;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Scripts/Abilities/AuraBreak.as b/Scripts/Abilities/AuraBreak.as
new file mode 100644
index 0000000..b3d64e2
--- /dev/null
+++ b/Scripts/Abilities/AuraBreak.as
@@ -0,0 +1,10 @@
+namespace Gen7 {
+    class AuraBreakAbility : PkmnScript {
+        void OnSecondaryEffect(ExecutingMove@, Pokemon@ target, uint8){
+            auto battle = target.Battle;
+            battle.RemoveVolatile("FairyAura");
+            battle.RemoveVolatile("DarkAura");
+            battle.AddVolatile("AuraBreak");
+        }
+    }
+}
\ No newline at end of file
diff --git a/Scripts/Abilities/BadDreams.as b/Scripts/Abilities/BadDreams.as
new file mode 100644
index 0000000..675b7dc
--- /dev/null
+++ b/Scripts/Abilities/BadDreams.as
@@ -0,0 +1,26 @@
+namespace Gen7 {
+    [Ability effect=BadDreams]
+    class BadDreams : PkmnScript {
+        void OnEndTurn(){
+            auto owner = cast<Pokemon@>(GetOwner());
+            auto ownerSide = owner.BattleSide;
+            auto battle = owner.Battle;
+            if (battle is null) return;
+            for (uint64 i = 0; i < battle.Sides.Length; i++){
+                auto side = battle.Sides[i];
+                if (side is ownerSide){
+                    continue;
+                }
+                for (uint64 j = 0; j < side.Pokemon.Length; j++){
+                    auto opponent = side.Pokemon[j];
+                    if (opponent is null || opponent.IsFainted){
+                        continue;
+                    }
+                    if (opponent.Status == "Sleep"){
+                        opponent.Damage(uint(opponent.MaxHealth / 8), DamageSource::Misc);
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Scripts/Battle/AuraBreak.as b/Scripts/Battle/AuraBreak.as
new file mode 100644
index 0000000..a7f80af
--- /dev/null
+++ b/Scripts/Battle/AuraBreak.as
@@ -0,0 +1,12 @@
+namespace Gen7 {
+    class AuraBreak : PkmnScript {
+        void OverrideBasePower(ExecutingMove@ move, Pokemon@, uint8, uint8 &inout power){
+            auto typeLib = move.User.Battle.Library.StaticLibrary.TypeLibrary;
+            auto fairyType = typeLib.GetTypeId("fairy");
+            auto darkType = typeLib.GetTypeId("dark");
+            if (move.UseMove.Type == fairyType || move.UseMove.Type == darkType){
+                power = uint8(power * 0.75f);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Scripts/Interfaces/narray.astypedef b/Scripts/Interfaces/narray.astypedef
index 451d23c..a993cfd 100644
--- a/Scripts/Interfaces/narray.astypedef
+++ b/Scripts/Interfaces/narray.astypedef
@@ -1,5 +1,5 @@
 type narray<T> {
     uint64 Length { get const; };
-    const T@ At(uint64 index) const;
-    const T@ get_opIndex(uint64) const property;
+    T@ At(uint64 index) const;
+    T@ get_opIndex(uint64) const property;
 }