Bolas, Omega Pharaoh

+1: Exile your top card: if it is a red sorcery or instant, play it face down. To activate it, pay 4 mana. If it does any damage, it does twice that.
-6: Draw 2 cards: Play one creature from among them for 3 mana of any color. It has +2/+2 and haste until end of turn.
-20: Place a Bolas Emblem under your enemies control: It activates immediately and you gain 5 life for each creature you control.