Cheapest priced copy (Core Set 2020): $0.35 at Card Kingdom, near mint, their price list as of .
Aether Gust 
Instant · Uncommon · Core Set 2020 · #42
Choose target spell or permanent that's red or green. Its owner puts it on their choice of the top or bottom of their library.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 42 | Uncommon | $0.35 | $0.49 |
| Secret Lair Drop | 330 | Rare | $1.99 | $1.49 |
2 rulings from Wizards of the Coast
- 12 July 2019The owner of the target spell or permanent chooses to put it either on the top or bottom of their library.
- 12 July 2019If a spell is put into its owner’s library, it’s removed from the stack and thus will not resolve. The spell isn’t countered; it no longer exists. This works against a spell that can’t be countered.