Cheapest priced copy (Forgotten Realms Commander): $0.99 at Card Kingdom, near mint, their price list as of .
Cataclysmic Gearhulk 
Artifact Creature — Construct · 4/5 · Mythic · Kaladesh · #9
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.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $0.99 to $47.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 65 | Mythic | $0.99 | — |
| Commander 2020 | 80 | Mythic | $0.99 | — |
| Kaladesh | 9 | Mythic | $1.29 | $2.99 |
| March of the Machine Commander | 176 | Mythic | $0.99 | — |
| Kaladesh Inventions | 1 | Special | — | $47.99 |
| Neon Dynasty Commander | 81 | Mythic | $0.99 | — |
| Kaladesh Promos | 9s | Mythic | — | $5.49 |
5 rulings from Wizards of the Coast
- 20 September 2016First the player whose turn it is chooses permanents they control, then each other player in turn order does the same. Each player will know the choices made by players who chose before them. All of the unchosen nonland permanents are then sacrificed simultaneously.
- 20 September 2016Lands can't be chosen and won't be sacrificed, even if they have other types (such as an artifact land).
- 20 September 2016A permanent with more than one type may be chosen as either of the types or both. For example, an artifact creature may be chosen as the artifact, the creature, or both. Choosing the same permanent twice this way has the same result as choosing it once.
- 20 September 2016Cataclysmic Gearhulk will be sacrificed to its own ability if you don't choose it as your artifact or your creature.
- 20 September 2016If you don't control any permanents of one of the types, you'll still choose the permanents of the types you do control.