Bygone Bishop is a rare Creature — Spirit Cleric card from Crimson Vow Commander (VOC), collector number 80. Current market price: $0.30, 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.")