Mindblaze is a rare Sorcery card from Champions of Kamigawa (CHK), collector number 180. Current market price: $0.31 (foil $0.43), TCGplayer market prices via Scryfall.
Choose a nonland card name and a number greater than 0. Target player reveals their library. If that library contains exactly the chosen number of cards with the chosen name, Mindblaze deals 8 damage to that player. Then that player shuffles.