Cheapest priced copy (Strixhaven: School of Mages): $0.35 at Card Kingdom, near mint, their price list as of .
Aether Helix 
Sorcery · Uncommon · Strixhaven: School of Mages · #162
Return target permanent to its owner's hand. Return target permanent card from your graveyard to your hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages | 162 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 16 April 2021You must choose two legal targets in order to cast Aether Helix. If there are either no permanent cards in your graveyard or no permanents on the battlefield, you cannot begin to cast it.
- 16 April 2021If only one target is still legal as Aether Helix tries to resolve, it will still resolve and perform the appropriate action on the remaining target.