Aeromunculus is a common Creature — Homunculus Mutant card from Ravnica Allegiance (RNA), collector number 152. Current market price: $0.12 (foil $0.35), TCGplayer market prices via Scryfall.
Flying {2}{G}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)