Tibalt's Trickery is a rare Instant card from Secret Lair Drop (SLD), collector number 7027. Current market price: $15.18, TCGplayer market prices via Scryfall.
Counter target spell. Choose 1, 2, or 3 at random. Its controller mills that many cards, then exiles cards from the top of their library until they exile a nonland card with a different name than that spell. They may cast that card without paying its mana cost. Then they put the exiled cards on the bottom of their library in a random order.