use opponents creatures to peel their library

Imprint — , : You may exile an instant or sorcery card with mana value X from your hand. At the beginning of your upkeep, you may copy a card exiled with this artifact. If you do, you may cast the copy without paying its mana cost.

Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn. (It can attack and this turn.)

Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.