Carnage Interpreter is a rare Creature — Devil Detective card from Ravnica: Clue Edition (CLU), collector number 26. Current market price: $2.63, TCGplayer market prices via Scryfall.
When this creature enters, discard your hand, then investigate four times. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") As long as you have one or fewer cards in hand, this creature gets +2/+2 and has menace.