Superfriend DragonFaceEater

You can't cast Superfriend DragonFaceEater if you don't control a planeswalker.
At the beginning of each end step, for each planeswalker you control that was dealt damage this turn, target opponent may sacrifice a creature. If he or she doesn't, you may draw a card, then scry two.
Planeswalkers you control have "-1: Destroy target artifact or enchantment."