* Doubling Cube - Added support for possible mana calculation (related to #6698).

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

@@ -267,6 +267,12 @@ public interface Abilities<T extends Ability> extends List<T>, Serializable {
      */
     boolean containsClass(Class classObject);
 
+    /**
+     * Returns true if one or more of the abilities are activated mana abilities with the pollDependant flag set to true.
+     * @return 
+     */
+    boolean hasPoolDependantAbilities();
+    
     /**
      * Copies this set of abilities. This copy should be new instances of all
      * the contained abilities.