Traxos, Scourge Eternal is a uncommon Legendary Artifact Creature — Dragon Construct card from Reality Fracture (FRA), collector number 280. Current market price: $0.17 (foil $0.29), TCGplayer market prices via Scryfall.
Trample Traxos doesn't untap during your untap step. Whenever you cast an artifact or creature spell, untap Traxos.