Fix casting of Disturb cards with Auras on the back (#8600)

Mage/src/main/java/mage/abilities/keyword/DisturbAbility.java

@@ -30,14 +30,10 @@ public class DisturbAbility extends SpellAbility {
     private SpellAbility spellAbilityToResolve;
 
     public DisturbAbility(Card card, String manaCost) {
-        super(card.getSpellAbility());
+        super(card.getSecondFaceSpellAbility());
         this.newId();
 
-        // verify check
+        // getSecondFaceSpellAbility() already verified that second face exists
-        if (card.getSecondCardFace() == null || card.getSecondCardFace().getClass().equals(card.getClass())) {
-            throw new IllegalArgumentException("Wrong code usage. Disturb ability can be added to double faces card only (main side).");
-        }
-
         this.setCardName(card.getSecondCardFace().getName() + " with Disturb");
         this.zone = Zone.GRAVEYARD;
         this.spellAbilityType = SpellAbilityType.BASE_ALTERNATE;

Mage/src/main/java/mage/cards/Card.java

@@ -72,6 +72,8 @@ public interface Card extends MageObject {
 
     Card getSecondCardFace();
 
+    SpellAbility getSecondFaceSpellAbility();
+
     boolean isNightCard();
 
     void assignNewId();

Mage/src/main/java/mage/cards/CardImpl.java

@@ -636,6 +636,15 @@ public abstract class CardImpl extends MageObjectImpl implements Card {
         return secondSideCard;
     }
 
+    @Override
+    public SpellAbility getSecondFaceSpellAbility() {
+        Card secondFace = getSecondCardFace();
+        if (secondFace == null || secondFace.getClass().equals(getClass())) {
+            throw new IllegalArgumentException("Wrong code usage. getSecondFaceSpellAbility can only be used for double faced card (main side).");
+        }
+        return secondFace.getSpellAbility();
+    }
+
     @Override
     public boolean isNightCard() {
         return this.nightCard;

Mage/src/main/java/mage/game/stack/Spell.java

@@ -768,6 +768,11 @@ public class Spell extends StackObjectImpl implements Card {
         return null;
     }
 
+    @Override
+    public SpellAbility getSecondFaceSpellAbility() {
+        return null;
+    }
+
     @Override
     public boolean isNightCard() {
         return false;