Cheapest priced copy (Dragon's Maze): $0.35 at Card Kingdom, near mint, their price list as of .
Punish the Enemy 
Instant · Common · Dragon's Maze · #35
Punish the Enemy deals 3 damage to target player or planeswalker and 3 damage to target creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dragon's Maze | 35 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 15 April 2013If one of Punish the Enemy’s targets is illegal when it tries to resolve, it will still deal damage to the remaining legal target.
- 15 April 2013You must be able to target a player and a creature in order to cast Punish the Enemy.