Cheapest priced copy (Fifth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Ray of Command 
Instant · Common · Commander 2011 · #56
Untap target creature an opponent controls and gain control of it until end of turn. That creature gains haste until end of turn. When you lose control of the creature, tap it.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
6 printings · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Edition | 114 | Common | $0.35 | — |
| Battle Royale Box Set | 56 | Common | $0.35 | — |
| Commander 2011 | 56 | Common | $0.35 | — |
| Duel Decks: Jace vs. Vraska | 29 | Common | $0.35 | — |
| Ice Age | 92 | Common | $0.35 | — |
| Mirage | 86 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 4 October 2004You may target an untapped creature with Ray of Command.
- 4 October 2004The creature returns to the opponent when the “until end of turn” effect wears off during the cleanup step. It taps during the Cleanup step (if it is not already tapped), so any abilities triggered off it tapping happen at that time.
- 1 October 2008You tap the creature when you lose control of it for any reason — because Ray of Command’s effect ends, or because a spell or ability causes another player to gain control of it.