Cheapest priced copy (March of the Machine): $0.79 at Card Kingdom, near mint, their price list as of .
Seal from Existence 
Enchantment · Uncommon · March of the Machine · #35
Ward {3} (Whenever this enchantment becomes the target of a spell or ability an opponent controls, counter it unless that player pays {3}.)
When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.79 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 35 | Uncommon | $0.79 | $0.99 |
5 rulings from Wizards of the Coast
- 14 April 2023Seal from Existence’s last ability creates two one-shot effects: one that exiles the permanent when the ability resolves, and another that returns the exiled card to the battlefield immediately after Seal from Existence leaves the battlefield.
- 14 April 2023Auras attached to the exiled permanent will be put into their owners’ graveyards. Equipment attached to an exiled creature will become unattached and remain on the battlefield. Any counters on the exiled permanent will cease to exist.
- 14 April 2023In a multiplayer game, if Seal from Existence’s owner leaves the game, the exiled card will return to the battlefield. Because the one-shot effect that returns the card isn’t an ability that goes on the stack, it won’t cease to exist along with the leaving player’s spells and abilities on the stack.
- 14 April 2023If a token is exiled, it ceases to exist. It won’t be returned to the battlefield.
- 14 April 2023If Seal from Existence leaves the battlefield before its last ability resolves, the target permanent won’t be exiled.