Gutmorn, Pactbound Servant is a mythic Legendary Creature — Demon card from Alchemy: Innistrad (YMID), collector number 28.
Flying, deathtouch When Gutmorn enters, each player discards a nonland card. Whenever a player discards a card during your turn, they choose another player. That player conjures a duplicate of that card into their hand. It perpetually gains prismatic.