Cheapest priced copy (Duel Decks: Elspeth vs. Tezzeret): $0.35 at Card Kingdom, near mint, their price list as of .
Kemba's Skyguard 
Creature — Cat Knight · 2/2 · Common · Scars of Mirrodin · #13
Flying
When this creature enters, you gain 2 life.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Elspeth vs. Tezzeret | 13 | Common | $0.35 | — |
| Scars of Mirrodin | 13 | Common | $0.35 | $0.49 |