Fairgrounds Trumpeter is a common Creature — Elephant card from March of the Machine (MOM), collector number 335. Current market price: $0.21 (foil $0.27), TCGplayer market prices via Scryfall.
At the beginning of each end step, if a +1/+1 counter was put on a permanent under your control this turn, put a +1/+1 counter on this creature.