Cataclysm, Arbiter of the End

Flying, Double Strike
When Cataclysm, Arbiter of the End enters the battlefield, search you r library far a card named
Izaal, Mind-Shattered, reveal it, and put it into your hand. Then, your turn ends.
During your end step, if you control both this card
and Calamity, Envoy of the End, you win the game.