Traxos, Scourge of Kroog is a rare Legendary Artifact Creature — Dragon Construct card from Dominaria United Commander (DMC), collector number 195. Current market price: $0.40, TCGplayer market prices via Scryfall.
Trample Traxos enters tapped and doesn't untap during your untap step. Whenever you cast a historic spell, untap Traxos. (Artifacts, legendaries, and Sagas are historic.)