Cheapest priced copy (Apocalypse): $0.35 at Card Kingdom, near mint, their price list as of .
Dead Ringers 
Sorcery · Common · Mystery Booster 2 · #41
Destroy two target nonblack creatures unless either one is a color the other isn't. They can't be regenerated.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Apocalypse | 37 | Common | $0.35 | $0.99 |
| Mystery Booster 2 | 41 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 4 October 2004Both of the target creatures must be exactly the same color or combination of colors. Both being colorless is also okay. If they differ in any way, you can still cast the spell, but it does not do anything on resolution.
- 4 October 2004Colors are checked on resolution.