Cheapest priced copy (Journey into Nyx): $0.35 at Card Kingdom, near mint, their price list as of .
Countermand 
Instant · Common · Journey into Nyx · #33
Counter target spell. Its controller mills four cards.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Journey into Nyx | 33 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 26 April 2014You may target a spell that can't be countered with Countermand. If you do, when Countermand resolves, the target spell won't be countered, but its controller will still put the top four cards of their library into their graveyard.
- 26 April 2014If the target spell is an illegal target when Countermand tries to resolve, Countermand won't resolve and none of its effects will happen. The target's controller won't put any cards from the top of their library into their graveyard.