Steelswarm Operator is a uncommon Artifact Creature — Robot Soldier card from Edge of Eternities (EOE), collector number 80. Current market price: $0.25 (foil $0.34), TCGplayer market prices via Scryfall.
Flying {T}: Add {U}. Spend this mana only to cast an artifact spell. {T}: Add {U}{U}. Spend this mana only to activate abilities of artifact sources.