Mummy Rot

This spell allows the caster to attack with a rotting touch similar to that of a mummy. If the caster touches a human, demihuman, or humanoid victim, the victim immediately loses 2-12 (2d6) hit points and is infected with a rotting disease which is fatal in 1-6 months. For each month the rot progresses, the victim permanently loses 2 points of Charisma. While infected, the victim recovers lost hit points at 10 percent of his normal rate.
The rotting disease can be cured only with a Cure Disease spell; cure wounds has no effect. A Regenerate spell will restore damage but will not otherwise affect the course of the disease. If a victim makes a successful saving throw, he is not infected, but he still suffers 2-12 hit points of damage.

[Complete Wizard's Handbook]

School: Necromancy
Level: 5
Rarity: Uncommon

Range: Touch
Components: V, S, M
Duration: 1 round/ level
Casting Time: 5
Area of Effect: One victim
Saving Throw: Special

Material Components:
a piece of rotten fruit and a piece of a mummy's cloth wrapping