Cheapest priced copy (Aether Revolt): $0.49 at Card Kingdom, near mint, their price list as of .
Release the Gremlins 
Sorcery · Rare · Aether Revolt · #96
Destroy X target artifacts. Create X 2/2 red Gremlin creature tokens.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $2.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aether Revolt | 96 | Rare | $0.49 | $0.49 |
| Aether Revolt Promos | 96s | Rare | — | $2.29Out of stock |
| The List | AER-96 | Rare | $0.49 | — |
3 rulings from Wizards of the Coast
- 9 February 2017You can target an artifact with indestructible. It won’t be destroyed, and you’ll still create X Gremlin tokens.
- 9 February 2017If an artifact becomes an illegal target for Release the Gremlins, it won’t change the number of tokens created. However, if every target artifact becomes an illegal target, Release the Gremlins doesn’t resolve and no tokens are created.
- 9 February 2017The value of X is limited by the number of artifacts that you can target. You can’t target the same artifact more than once.