Cheapest priced copy (The Brothers' War): $0.35 at Card Kingdom, near mint, their price list as of .
Military Discipline 
Enchantment — Aura · Common · The Brothers' War · #17
Flash
Enchant creature
When this Aura enters, enchanted creature gains first strike until end of turn.
Enchanted creature gets +1/+0.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War | 17 | Common | $0.35 | $0.49 |