- Added Earwig Squad and Latchkey Faerie

src/main/java/forge/card/cardfactory/CardFactoryUtil.java

@@ -3123,6 +3123,7 @@ public class CardFactoryUtil {
         altCostSA.setRestrictions(restriction);
         altCostSA.setDescription(sb.toString());
         altCostSA.setBasicSpell(false);
+        altCostSA.setAltCost(true);
 
         return altCostSA;
     }

src/main/java/forge/card/spellability/SpellAbility.java

@@ -112,6 +112,7 @@ public abstract class SpellAbility implements ISpellAbility {
     private boolean undoable;
     
     private boolean isCopied = false;
+    private boolean isAltCost = false;
 
     public final AbilityManaPart getManaPart() {
         return manaPart;
@@ -1756,5 +1757,23 @@ public abstract class SpellAbility implements ISpellAbility {
     public boolean isXCost() {
         CostPartMana cm = payCosts != null ? getPayCosts().getCostMana() : null;
         return cm != null && cm.getAmountOfX() > 0; 
-    }    
+    }
+
+    /**
+     * @param isAltCost the isAltCost to set
+     */
+    public void setAltCost(boolean isAltCost) {
+        this.isAltCost = isAltCost; 
+    }
+    
+    /**
+     * @return the isAltCost
+     */
+    public boolean isAltCost() {
+        // only used in prowl, cannot distinguish the alt cost type currently
+        // TODO : support the altcost type
+        return isAltCost;
+    }
+
+
 }

src/main/java/forge/card/trigger/TriggerSpellAbilityCast.java

@@ -74,6 +74,12 @@ public class TriggerSpellAbilityCast extends Trigger {
                 return false;
             }
         }
+        
+        if (this.getMapParams().containsKey("AltCostSpellAbility")) {
+            if (!spellAbility.isAltCost()) {
+                return false;
+            }
+        }
 
         if (this.getMapParams().containsKey("ValidControllingPlayer")) {
             if (!matchesValid(cast.getController(), this.getMapParams().get("ValidControllingPlayer").split(","),