Cheapest priced copy (Apocalypse): $0.35 at Card Kingdom, near mint, their price list as of .
Death Mutation 
Sorcery · Uncommon · Apocalypse · #96
Destroy target nonblack creature. It can't be regenerated. Create X 1/1 green Saproling creature tokens, where X is that creature's mana value.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.35 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Apocalypse | 96 | Uncommon | $0.35 | $2.49 |
| Commander 2011 | 192 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 1 August 2008If the target is illegal on resolution, the entire spell doesn’t resolve. As such, you will not put any tokens onto the battlefield.