Vandal Ghorn

+1: Gain control of target creature until end of turn. Untap it. It gains haste. If it deals damage to a player or planeswalker, sacrifice it.
0: Until your next upkeep, if damage is dealt to Vandal Ghorn, deal that much damage to any target.
-5: The next source you control that would deal damage to an opponent or planeswalker deals twice that damage.