Update BT25_055.cs

Fix soft lock after playing a card with AT

Assets/Scripts/CardEffect/BT25/Green/BT25_055.cs

@@ -177,6 +177,8 @@ namespace DCGO.CardEffects.BT25
                             if (cardSources.Count > 0)
                             {
                                 Used = true;
+
+                                return null;
                             }
 
                             return null;