Salvation Colossus is a rare Artifact Creature — Construct card from Modern Horizons 3 Commander (M3C), collector number 95. Current market price: $0.28, TCGplayer market prices via Scryfall.
Flying, vigilance, trample Whenever you attack, other creatures you control get +2/+2 and gain indestructible until end of turn. Unearth—Pay eight {E}. (Pay eight energy counters: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)