Val'khar,The Demon Prince

+2: Deal damage to target creature, the damage is equal to the creature's cost
-4: Gain control of your opponent's creature for this and next turn, if the creature dies you may gain 2 life or deal 2 damage to target creature.
-9: Put a 3/3 counter on every creature you control, if the creature with the counter on it is exiled or destroyed opponent sacrifices a creature