Rebecca Uncontained

+2: Discard a card, then draw two cards. You gain life equal to the discarded card's mana value.
0: Until the end of turn, Rebecca Uncontained becomes an 7/7 Juggernaut creature with haste, indestructible, and flying.
-4: Destroy target permanent an opponent controls. Rebecca Uncontained deals damage to that creature's controller equal to it's power.