Iggwilv, Witch Queen

Deathtouch
Mystic Arcanum - At the beginning of your end
step, exile the top card of your library. Until the
end of your next turn, you may play that card.
Pact Boon - Whenever you play a card from exile, create a Treasure token.
"The Demonomicon held the dark secrets of Iggwilv's dominance over more than a dozen abyssal lords."