Ticking Mime Bomb is a uncommon Artifact Creature — Clown Robot Mime card from Unfinity (UNF), collector number 124. Current market price: $0.08 (foil $0.16), TCGplayer market prices via Scryfall.
When this creature enters, without speaking or indicating any specific creature, pantomime to a person outside the game, then they choose a creature you don't control. This creature deals damage equal to twice the number of Robots you control to the chosen creature.