* Guilded Drake - Fixed that the sacrifice did not happen if the target creature for exchange is no longer a valid target during resolution (fixes #1546).

Mage/src/main/java/mage/abilities/Ability.java

@@ -568,4 +568,8 @@ public interface Ability extends Controllable, Serializable {
     MageObject getSourceObjectIfItStillExists(Game game);
 
     String getTargetDescription(Targets targets, Game game);
+
+    void setCanFizzle(boolean canFizzle);
+
+    boolean canFizzle();
 }