Inaccurate?

Scale Weakening

(Draconomicon)

Transmutation
Level: Sorcerer 2, Wizard 2,
Components: V, S, M,
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: Ray
Duration: 10 minutes/level (D)
Saving Throw: None
Spell Resistance: Yes

A dull gray ray projects from your hand.
You must succeed on a ranged touch attack to strike a target.
The target's natural armor bonus is reduced by 4 points, +1 point per two caster levels above 3rd (maximum reduction 10 points at 15th level).
This spell can't reduce a creature's natural armor bonus to less than 0, nor does it have any effect on an enhancement bonus to natural armor (such as that granted by the barkskin spell).
Material Component: A shed snakeskin.

Also appears in

  1. Spell Compendium