Ultron's Auxiliary is a uncommon Artifact Creature — Robot Villain card from Marvel Super Heroes Commander (MSC), collector number 669. Current market price: $0.99 (foil $2.62), TCGplayer market prices via Scryfall.
Menace Whenever another artifact is put into your graveyard from the battlefield or an artifact card is put into your graveyard from anywhere other than the battlefield, put a +1/+1 counter on this creature.