Cheapest priced copy (Wilds of Eldraine Commander): $13.99 at Card Kingdom, near mint, their price list as of .
Retether 
Sorcery · Rare · Planar Chaos · #13
Return each Aura card from your graveyard to the battlefield. Only creatures can be enchanted this way. (Aura cards that can't enchant a creature on the battlefield remain in your graveyard.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $13.99 to $49.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Planar Chaos | 13 | Rare | $14.99 | $49.99 |
| Wilds of Eldraine Commander | 72 | Rare | $13.99 | — |
2 rulings from Wizards of the Coast
- 1 February 2007Auras don't need to say "enchant creature" to return to the battlefield. For example, an Aura with "enchant land" will return to the battlefield if there's an animated land for it to enchant.
- 1 February 2007All the Auras return to the battlefield simultaneously. Whether an Aura can be attached to a creature is checked before any of them are returned and doesn't take into account any simultaneously returning Auras. For example, if Tattoo Ward (which gives enchanted creature protection from enchantments) and Holy Strength are in your graveyard and there's only one creature on the battlefield, both Auras are returned to the battlefield attached to that creature, then Holy Strength is put into your graveyard the next time state-based actions are checked.