Threats Undetected is a rare Sorcery card from Dominaria United Promos (PDMU), collector number 185s. Current market price: — (foil $0.86), TCGplayer market prices via Scryfall.
Search your library for up to four creature cards with different powers and reveal them. An opponent chooses two of those cards. Shuffle the chosen cards into your library and put the rest into your hand.