Cheapest priced copy (March of the Machine): $0.35 at Card Kingdom, near mint, their price list as of .
Crystal Carapace 
Enchantment — Aura · Common · March of the Machine · #183
Enchant creature
Enchanted creature gets +3/+3 and has ward {2}.
Cycling {2} ({2}, Discard this card: Draw a card.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 183 | Common | $0.35 | $0.49 |