Cheapest priced copy (Core Set 2019): $0.49 at Card Kingdom, near mint, their price list as of .
Isolate 
Instant · Rare · Pioneer Challenger Decks 2021 · #3
Exile target permanent with mana value 1.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2019 | 17 | Rare | $0.49 | $0.49 |
| Core Set 2019 Promos | 17s | Rare | — | $0.49 |
| Pioneer Challenger Decks 2021 | 3 | Rare | $0.49 | — |
One ruling from Wizards of the Coast
- 13 July 2018If a permanent has {X} in its mana cost, X is considered to be 0.