Coalstoke Gearhulk is a mythic Artifact Creature — Construct card from Aetherdrift Promos (PDFT), collector number 198s. Current market price: — (foil $1.38), TCGplayer market prices via Scryfall.
Menace, deathtouch When this creature enters, put target creature card with mana value 4 or less from a graveyard onto the battlefield under your control with a finality counter on it. That creature gains menace, deathtouch, and haste. At the beginning of your next end step, exile that creature.