Scrap Welder is a rare Creature — Goblin Artificer card from Kamigawa: Neon Dynasty Promos (PNEO), collector number 159p. Current market price: $0.42 (foil $0.48), TCGplayer market prices via Scryfall.
{T}, Sacrifice an artifact with mana value X: Return target artifact card with mana value less than X from your graveyard to the battlefield. It gains haste until end of turn.