Whenever you cast a spell you don t own, create a 3 3 black Demon creature token.
+1: Draw a card. For each opponent, exile up to one target instant or sorcery card from that player s graveyard and put a page counter on it.
−3: You may cast a spell from among cards in exile with page counters on them without paying its mana cost.
Tasha, the Witch Queen can be your commander.