Metalwork Colossus is a rare Artifact Creature — Construct card from The Brothers' War Commander (BRC), collector number 147. Current market price: $1.11, TCGplayer market prices via Scryfall.
This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control. Sacrifice two artifacts: Return this card from your graveyard to your hand.