Foundry Hornet is a uncommon Creature — Insect card from Aether Revolt (AER), collector number 59. Current market price: $0.21 (foil $0.34), TCGplayer market prices via Scryfall.
Flying When this creature enters, if you control a creature with a +1/+1 counter on it, creatures your opponents control get -1/-1 until end of turn.