Dark mage, The Fallen

+3: Destroy Target Creature that attacked this turn. Sacrifice a creature.
-10: This becomes a 10/10 Sith Demon creature with Flying,Haste,First strike,Lifelink and Indestructible until end of turn. Sacrifice a creature.
-13: Put three Legendary Sith Creature cards from you hand onto the battlefield without paying their mana costs. Sacrifice a creature.