Cheapest priced copy (Dominaria): $0.35 at Card Kingdom, near mint, their price list as of .
Seal Away 
Enchantment · Uncommon · Dominaria · #31
Flash
When this enchantment enters, exile target tapped creature an opponent controls until this enchantment leaves the battlefield.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria | 31 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 27 April 2018If Seal Away leaves the battlefield before its triggered ability resolves, the target creature won’t be exiled.
- 27 April 2018If a token is exiled this way, it will cease to exist and won’t return to the battlefield.
- 27 April 2018Auras attached to the exiled creature will be put into their owners’ graveyards. Any Equipment will become unattached and remain on the battlefield. Any counters on the exiled creature will cease to exist. When the card returns to the battlefield, it will be a new object with no connection to the card that was exiled.