Aminatou's Augury is a rare Sorcery card from Duskmourn: House of Horror Commander (DSC), collector number 71. Current market price: $0.39, TCGplayer market prices via Scryfall.
Exile the top eight cards of your library. You may put a land card from among them onto the battlefield. Until end of turn, for each nonland card type, you may cast a spell of that type from among the exiled cards without paying its mana cost.