Cheapest priced copy (Champions of Kamigawa): $0.35 at Card Kingdom, near mint, their price list as of .
Serpent Skin 
Enchantment — Aura · Common · Champions of Kamigawa · #240
Flash
Enchant creature
Enchanted creature gets +1/+1.
{G}: Regenerate enchanted creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Champions of Kamigawa | 240 | Common | $0.35 | $0.49 |
| Salvat 2005 | K44 | Common | — | — |