Cheapest priced copy (Tenth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Firebreathing 
Enchantment — Aura · Common · Magic 2012 · #132
Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
21 printings · $0.35 to $32.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 200 | Common | $0.35 | — |
| Tenth Edition | 200★ | Common | — | $0.49 |
| Unlimited Edition | 151 | Common | $0.99 | — |
| 30th Anniversary Edition | 146 | Common | $0.99 | — |
| 30th Anniversary Edition | 443 | Common | $23.99 | — |
| Revised Edition | 151 | Common | $0.35 | — |
| Fourth Edition Foreign Black Border | 193 | Common | — | — |
| Fourth Edition | 193 | Common | $0.35 | — |
| Fifth Edition | 228 | Common | $0.35 | — |
| Classic Sixth Edition | 177 | Common | $0.35 | — |
| Ninth Edition | 181 | Common | $0.35 | — |
| Ninth Edition | 181★ | Common | — | $0.49 |
| Collectors' Edition | 151 | Common | $0.99 | — |
| Intl. Collectors' Edition | 151 | Common | $0.99 | — |
| Foreign Black Border | 151 | Common | — | — |
| Limited Edition Alpha | 150 | Common | $32.99Out of stock | — |
| Limited Edition Beta | 151 | Common | $5.99 | — |
| Magic 2010 | 137 | Common | $0.35 | $0.49 |
| Magic 2012 | 132 | Common | $0.35 | $0.49 |
| Mirage | 174 | Common | $0.35 | — |
| Summer Magic / Edgar | 151 | Common | — | — |
2 rulings from Wizards of the Coast
- 1 October 2009The ability affects whichever creature is enchanted by Firebreathing at the time the ability resolves. The bonus remains even if Firebreathing stops enchanting that creature.
- 1 October 2009This ability can be activated by Firebreathing’s controller, not the enchanted creature’s controller (in case they’re different players).