Bygone Bishop is a rare Creature — Spirit Cleric card from Shadows over Innistrad (SOI), collector number 8. Current market price: $0.27 (foil $0.79), TCGplayer market prices via Scryfall.
Flying Whenever you cast a creature spell with mana value 3 or less, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")