Assaultron Dominator is a rare Artifact Creature — Robot card from Fallout (PIP), collector number 582. Current market price: — (foil $2.52), TCGplayer market prices via Scryfall.
When this creature enters, you get {E}{E} (two energy counters). Whenever an artifact creature you control attacks, you may pay {E}. If you do, put your choice of a +1/+1, first strike, or trample counter on that creature.