Cheapest priced copy (Dragons of Tarkir): $0.35 at Card Kingdom, near mint, their price list as of .
Revealing Wind 
Instant · Common · Dragons of Tarkir · #197
Prevent all combat damage that would be dealt this turn. You may look at each face-down creature that's attacking or blocking.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dragons of Tarkir | 197 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 25 February 2015You can cast Revealing Wind even if there are no face-down creatures attacking or blocking. The damage-prevention effect will still apply.