Streh, Forsaken Dragon

+2: Choose one: Put two red 2/1 Dragon creature tokens onto the battlefield or draw two cards, then discard one.
-6: Exile all creatures on the battlefield. For each creature of yours that was exiled this way draw a card and gain that much life.
-12: If Streh, Forsaken Dragon is on the battlefield and no player controls any creatures you win the game.