Mictlantecuhtli, Broken Face

Deathtouch, Indestructible

At the beginning of your combat phase, sacrifice a creature.

Sacrifice a Creature: Look at the bottom card of your library. If it's an Instant or Sorcery, you may cast that spell without paying its mana cost. If it's a creature, target opponent looses life equal to its mana cost. Activate only once per turn.