Cheapest priced copy (Planechase): $0.79 at Card Kingdom, near mint, their price list as of .
Lodestone Myr 
Artifact Creature — Myr · 2/2 · Rare · Mirrodin · #200
Trample
Tap an untapped artifact you control: This creature gets +1/+1 until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.79 to $11.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Planechase | 117 | Rare | $0.79 | — |
| Modern Masters 2015 | 220 | Rare | $0.99 | $3.99 |
| Mirrodin | 200 | Rare | $1.29 | $11.99 |