Korvold and the Noble Thief is a uncommon Enchantment — Saga card from Wilds of Eldraine (WOE), collector number 139. Current market price: $0.21 (foil $0.30), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II — Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") III — Exile the top three cards of target opponent's library. You may play those cards this turn.