diff --git a/Mage.Sets/src/mage/sets/magic2010/Fireball.java b/Mage.Sets/src/mage/sets/magic2010/Fireball.java
index 202699ad8fe..3b6f8ab5908 100644
--- a/Mage.Sets/src/mage/sets/magic2010/Fireball.java
+++ b/Mage.Sets/src/mage/sets/magic2010/Fireball.java
@@ -59,7 +59,7 @@ public class Fireball extends CardImpl<Fireball> {
 	public void adjustCosts(Ability ability, Game game) {
 		int numTargets = ability.getTargets().get(0).getTargets().size();
 		if (numTargets > 1) {
-			ability.getManaCosts().add(new GenericManaCost(numTargets - 1));
+			ability.getManaCostsToPay().add(new GenericManaCost(numTargets - 1));
 		}
 	}
 
diff --git a/Mage.Sets/src/mage/sets/riseoftheeldrazi/KhalniHydra.java b/Mage.Sets/src/mage/sets/riseoftheeldrazi/KhalniHydra.java
index 8416000f1d2..a396e4e6386 100644
--- a/Mage.Sets/src/mage/sets/riseoftheeldrazi/KhalniHydra.java
+++ b/Mage.Sets/src/mage/sets/riseoftheeldrazi/KhalniHydra.java
@@ -78,7 +78,7 @@ public class KhalniHydra extends CardImpl<KhalniHydra> {
 	public void adjustCosts(Ability ability, Game game) {
 		super.adjustCosts(ability, game);
 		int reductionAmount = game.getBattlefield().getAllActivePermanents(filter).size();
-		Iterator<ManaCost> iter = ability.getManaCosts().iterator();
+		Iterator<ManaCost> iter = ability.getManaCostsToPay().iterator();
 
 		while ( reductionAmount > 0 && iter.hasNext() ) {
 			iter.next();
diff --git a/Mage/src/mage/abilities/Ability.java b/Mage/src/mage/abilities/Ability.java
index 54c9cc73b22..19e217b06be 100644
--- a/Mage/src/mage/abilities/Ability.java
+++ b/Mage/src/mage/abilities/Ability.java
@@ -57,6 +57,7 @@ public interface Ability extends Serializable {
 	public Costs<Cost> getCosts();
 	public void addCost(Cost cost);
 	public ManaCosts<ManaCost> getManaCosts();
+	public ManaCosts<ManaCost> getManaCostsToPay();
 	public void addManaCost(ManaCost cost);
 	public List<AlternativeCost> getAlternativeCosts();
 	public void addAlternativeCost(AlternativeCost cost);
diff --git a/Mage/src/mage/game/stack/StackAbility.java b/Mage/src/mage/game/stack/StackAbility.java
index 54ddb3d24be..4e78295af9d 100644
--- a/Mage/src/mage/game/stack/StackAbility.java
+++ b/Mage/src/mage/game/stack/StackAbility.java
@@ -250,6 +250,11 @@ public class StackAbility implements StackObject, Ability {
 		return ability.getManaCosts();
 	}
 
+	@Override
+	public ManaCosts<ManaCost> getManaCostsToPay ( ) {
+		return ability.getManaCostsToPay();
+	}
+
 	@Override
 	public void addManaCost(ManaCost cost) { }