Cheapest priced copy (Hour of Devastation): $0.35 at Card Kingdom, near mint, their price list as of .
Countervailing Winds 
Instant · Common · Hour of Devastation · #32
Counter target spell unless its controller pays {1} for each card in your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Hour of Devastation | 32 | Common | $0.35 | $1.49 |
One ruling from Wizards of the Coast
- 14 July 2017Count the number of cards in your graveyard as Countervailing Winds resolves to determine how much mana the controller of the target spell must pay to avoid the spell being countered. Countervailing Winds is still on the stack at this time and won’t count toward this number.