Geist of Regret is a mythic Creature — Spirit card from Alchemy: Innistrad (YMID), collector number 16.
Flying When Geist of Regret enters the battlefield, put a random instant card from your library into your graveyard. Then put a random sorcery card from your library into your graveyard. Whenever you cast an instant or sorcery spell from your graveyard, copy that spell. You may choose new targets for the copy.