- Changed getValidCards to never return the Mana Pool.

- Added Upheaval.

res/cards.txt

@@ -1,3 +1,9 @@
+Upheaval
+4 U U
+Sorcery
+Return all permanents to their owners' hands.
+spBounceAll:Permanent:Hand
+
 Hibernation
 2 U
 Instant

src/forge/CardList.java

@@ -270,6 +270,7 @@ public class CardList implements Iterable<Card> {
             }
             retList.addAll(tmpList.toArray());
         }
+        if(retList.containsName("Mana Pool")) retList.remove("Mana Pool");
         return retList;
     }//getValidCards