Lavinia, Foil to Conspiracy is a rare Legendary Creature — Human Detective card from Ravnica: Clue Edition (CLU), collector number 36. Current market price: $1.39, TCGplayer market prices via Scryfall.
Vigilance Whenever you cast your second spell each turn, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") {T}: Add {C}{C}. Activate only during an opponent's turn.