Urabrask's Forge is a rare Artifact card from Phyrexia: All Will Be One Promos (PONE), collector number 153p. Current market price: $2.02 (foil $3.81), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, put an oil counter on this artifact, then create an X/1 red Phyrexian Horror creature token with trample and haste, where X is the number of oil counters on this artifact. Sacrifice that token at the beginning of the next end step.