Nulathoe's Ninemen

This spell protects a dead body against normal decay, magically strengthening the joints and repelling disease and rot. The spell does not heal wounds or reverse damage inflicted on the body in its living or dead state .
If the body is later brought back from the dead (with Raise Dead, Resurrection, or a similar spell), only the time elapsed between the death and casting of the ninemen (pronounced nin-EM-en) counts for determining success. Once the body is revived, the effect of the ninemen ends.
This spell can be cast only on bodies that were once alive and now are dead. It has no effect on undead. Also, while under the effects of the ninemen, the body cannot become undead or be animated using animate dead or similar spells.
The moonstone component is crushed and sprinkled over the body.

[Wizard's Spell Compendium, vol. 3]

School: Necromancy
Level: 5
Rarity: Rare or very rare spell from the FORGOTTEN REALMS setting . Known to be in Nchaser's Eiyromancia.

Range: Touch
Components: V, S, M
Duration: Permanent
Casting Time: 5
Area of Effect: 1 corpse of size L or smaller
Saving Throw: None

Material Components: a small amount of blood and a moonstone worth at least 50 gp