Cheapest priced copy (The List): $0.99 at Card Kingdom, near mint, their price list as of .
Countersquall 
Instant · Uncommon · Conflux · #103
Counter target noncreature spell. Its controller loses 2 life.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.99 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conflux | 103 | Uncommon | $1.29 | $4.49 |
| Duel Decks: Ajani vs. Nicol Bolas | 59 | Uncommon | $1.49 | — |
| The List | DDH-59 | Uncommon | $0.99 | — |
| Ultimate Masters | 198 | Uncommon | $0.99 | $2.99 |
One ruling from Wizards of the Coast
- 7 December 2018A spell that can’t be countered is a legal target for Countersquall. The spell won’t be countered when Countersquall resolves, but its controller still loses 2 life.