Cheapest priced copy (Magic 2012): $0.35 at Card Kingdom, near mint, their price list as of .
Frost Breath 
Instant · Common · Core Set 2021 · #51
Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic 2012 | 54 | Common | $0.35 | $0.49 |
| Magic 2014 | 56 | Common | $0.35 | $0.49 |
| Core Set 2021 | 51 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 23 June 2020Frost Breath can target tapped creatures. If a targeted creature is already tapped when the spell resolves, that creature just remains tapped and doesn't untap during its controller's next untap step.