Rebound

Pact {r}{r}{r}{r}{r} (You may cast this card without paying its mana cost and as though it had flash. If you do, you lose the game at the beginning of your next upkeep unless you pay {r}{r}{r}{r}{r}.)
Counter target spell. It's owner discards cards equal to it's converted mana cost, then exile all cards in it's owners graveyard.