Cheapest priced copy (Battlebond): $18.99 at Card Kingdom, near mint, their price list as of .
Seedborn Muse 
Creature — Spirit · 2/4 · Rare · Ninth Edition · #270
Untap all permanents you control during each other player's untap step.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
11 printings · $18.99 to $499.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 296 | Rare | $24.99 | $109.99Out of stock |
| Ninth Edition | 270 | Rare | $27.99 | — |
| Ninth Edition | 270★ | Rare | — | $84.99 |
| Battlebond | 212 | Rare | $18.99 | $69.99 |
| Commander 2019 | 179 | Rare | $20.99 | — |
| Commander Collection: Green | 4 | Rare | $22.99 | $44.99 |
| Legions | 138 | Rare | $27.99 | $499.99 |
| Murders at Karlov Manor Commander | 186 | Rare | $19.99 | — |
| The List | C19-179 | Rare | $21.99 | — |
| Secret Lair Drop | 907 | Rare | — | $109.99 |
| Tarkir: Dragonstorm Commander | 268 | Rare | $19.99 | — |
2 rulings from Wizards of the Coast
- 4 October 2004Other effects can prevent a permanent from untapping during an untap step. You do need to look carefully, however, as many effects say that the permanent does not untap during its controller's untap step, and this card's ability occurs during other players' untap steps. If a card does say this, then Seedborn Muse can untap it. But some other abilities are not written this way and can still prevent a card from untapping.
- 15 July 2007All your permanents untap during each other player's untap step. You have no choice about what untaps.