Cataclysmic Gearhulk is a mythic Artifact Creature — Construct card from Commander 2020 (C20), collector number 80. Current market price: $0.36, 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.