Vorak, the Devourer

Flying, Trample
Whenever Vorak, the Devourer deals combat damage to an opponent, defending player reveals card from the top of their library until they reveal a nonland permanent card. If that permanent was an artifact or creature, exile that card. That player puts all other revealed cards into their graveyard. You may cast artifacts exiled with Vorac, the Devourer. Vorak, the Devourer has all keywords of creatures exiled by it and +x/+x where x is the total power of all creatures exiled by it.