Circular Logic is a rare Instant card from Secret Lair Drop (SLD), collector number 1519. Current market price: $4.12, TCGplayer market prices via Scryfall.
Counter target spell unless its controller pays {1} for each card in your graveyard. Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)