Door Master

+2: Scry 1, gain 1 life, each opponent loses 1 life, deal 1 damage to any target, and create a 1/1 green insect token.
-6: Draw 3 cards, gain 7 life, destroy target nonland permanent, create a 4/4 green beast token, and deal 5 damage to any target.
-15: You win the game on your next upkeep.