Cheapest priced copy (Modern Masters): $0.99 at Card Kingdom, near mint, their price list as of .
Myr Enforcer 
Artifact Creature — Myr · 4/4 · Common · Mirrodin · #211
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
6 printings · $0.99 to $29.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Friday Night Magic 2009 | 2 | Rare | — | $10.99 |
| Planechase | 120 | Common | $1.79 | — |
| Foundations Jumpstart | 756 | Common | $1.29 | — |
| Modern Masters 2015 | 224 | Common | $1.29 | $4.49 |
| Modern Masters | 209 | Common | $0.99 | $4.49 |
| Mirrodin | 211 | Common | $1.49 | $29.99 |