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.
"You are safest in Candlekeep, Abdel, but I cannot keep you from the world forever."