Sokenzan Smelter is a uncommon Creature — Goblin Artificer card from Kamigawa: Neon Dynasty (NEO), collector number 164. Current market price: $0.24 (foil $0.13), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, you may pay {1} and sacrifice an artifact. If you do, create a 3/1 red Construct artifact creature token with haste.