Cheapest priced copy (Mirrodin): $0.35 at Card Kingdom, near mint, their price list as of .
Cobalt Golem 
Artifact Creature — Golem · 2/3 · Common · Mirrodin · #157
{1}{U}: This creature gains flying until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 157 | Common | $0.35 | $0.49 |