Inaccurate?

Dessicate

(Sandstorm)

Necromancy
Level: Cleric 2, Druid 2, Sorcerer 2, Wizard 2, Thirst 2,
Components: V, S, M,
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One living creature
Duration: Instantaneous
Saving Throw: Fortitude partial
Spell Resistance: Yes

You evaporate moisture from the body of a living creature, dealing it 1d6 points of dessication damage per two caster
levels (maximum 5d6) and making it dehydrated (see page 15).
A successful Fortitude save results in half damage and negates the dehydration.
A plant or elemental of the water subtype takes 1d8 points of damage per caster level (maximum 10d8).
An elemental of the earth subtype takes only 1d4 points of damage per two caster levels (maximum 5d4).
Material Component: A pinch of dust.