Combustible Gearhulk is a mythic Artifact Creature — Construct card from Duskmourn: House of Horror Commander (DSC), collector number 163. Current market price: $0.34, TCGplayer market prices via Scryfall.
First strike When this creature enters, target opponent may have you draw three cards. If the player doesn't, you mill three cards, then this creature deals damage to that player equal to the total mana value of those cards.