Nicol Bolas, The Arisen

+4: You draw 2 cards, untap all your creatures and 4 mana. Destroy target permanent, you gain 4 life.
+2: Return a card from a graveyard to your hand. Destroy target permanent, you gain as much life as the creatures power.
+12: Your opponent exiles everything in his graveyard and hand. You gain 7 life, draw 4 cards, and return your graveyard and exile pile to your hand.