Cheapest priced copy (Reality Fracture): $0.35 at Card Kingdom, near mint, their price list as of .
Infinite Coursework 
Enchantment — Aura · Common · Reality Fracture · #31
Enchant creature
When this Aura enters, tap enchanted creature. It becomes unprepared.
Enchanted creature loses all abilities and doesn't untap during its controller's untap step.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Reality Fracture | 31 | Common | $0.35 | $0.49 |