Ray of Entropy

(Spell Compendium, page 167, DnD 3.5)

Necromancy

Level: ; Sorcerer/Wizard 6
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: Ray
Duration: 1 minute/level
Saving Throw: None
Spell Resistance: Yes

You release a crackling black ray. The smell of decay fills the air.

When you cast this spell, you unleash a ray of negative energy that consumes the life energy of the subject. You must succeed on a ranged touch attack with the ray to strike a target. If your attack is successful against a living creature, the ray makes the subject weaker, slower, and less healthy. The subject takes a -4 penalty to Strength, Constitution, and Dexterity for the duration of the spell.