Cheapest priced copy (Guildpact): $0.35 at Card Kingdom, near mint, their price list as of .
Guardian's Magemark 
Enchantment — Aura · Common · Guildpact · #8
Flash
Enchant creature
Creatures you control that are enchanted get +1/+1.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guildpact | 8 | Common | $0.35 | $0.49 |
| Salvat 2005 | G5 | Common | — | — |
| Salvat 2005 | G52 | Common | — | — |