Cheapest priced copy (Duel Decks: Ajani vs. Nicol Bolas): $0.49 at Card Kingdom, near mint, their price list as of .
Ajani's Mantra 
Enchantment · Common · Magic 2011 · #2
At the beginning of your upkeep, you may gain 1 life.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Ajani vs. Nicol Bolas | 22 | Common | $0.49 | — |
| Magic 2011 | 2 | Common | $0.49 | $1.99 |