Agitator Ant is a rare Creature — Insect card from Murders at Karlov Manor Commander (MKC), collector number 145. Current market price: $0.36, TCGplayer market prices via Scryfall.
At the beginning of your end step, each player may put two +1/+1 counters on a creature they control. Goad each creature that had counters put on it this way. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)