Ironclad Revolutionary is a uncommon Creature — Aetherborn Artificer card from Aether Revolt (AER), collector number 65. Current market price: $0.09 (foil $0.08), TCGplayer market prices via Scryfall.
When this creature enters, you may sacrifice an artifact. If you do, put two +1/+1 counters on this creature and each opponent loses 2 life.