Inaccurate?

Frostbite

(Frostburn)

Conjuration (Creation) [Cold]
Level: Cleric 5, Disciple of Thrym 5,
Components: V, S, DF,
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature/2 levels, no two of which can be more than 30 ft. apart
Duration: Instantaneous
Saving Throw: Fortitude half
Spell Resistance: Yes

You chill the air and create a layer of frost on the skin of target creatures.
The targets are entitled to a Fortitude save; those who fail take 6d6 points of cold damage and 2d6 points of Dexterity damage.
Creatures dropping to 0 Dexterity are frozen in a layer of ice, shivering and unable to attack, move, or defend.