Cheapest priced copy (March of the Machine): $0.35 at Card Kingdom, near mint, their price list as of .
Realmbreaker's Grasp 
Enchantment — Aura · Common · March of the Machine · #33
Enchant artifact or creature
Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.
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 | 33 | Common | $0.35 | $0.49 |