Persuasive Interrogators is a uncommon Creature — Gorgon Detective card from Murders at Karlov Manor (MKM), collector number 345. Current market price: $0.19 (foil $0.21), TCGplayer market prices via Scryfall.
When this creature enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Whenever you sacrifice a Clue, target opponent gets two poison counters. (A player with ten or more poison counters loses the game.)