The Mirari Conjecture is a rare Enchantment — Saga card from Dominaria (DOM), collector number 57. Current market price: $0.24 (foil $0.91), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Return target instant card from your graveyard to your hand. II — Return target sorcery card from your graveyard to your hand. III — Until end of turn, whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy.