Cataclysmic Gearhulk is a mythic Artifact Creature — Construct card from March of the Machine Commander (MOC), collector number 176. Current market price: $0.41, TCGplayer market prices via Scryfall.
Vigilance When this creature enters, each player chooses an artifact, a creature, an enchantment, and a planeswalker from among the nonland permanents they control, then sacrifices the rest.