Creeping Cold, Greater

(Spell Compendium, page 56, DnD 3.5)

Transmutation[Cold]

Level: ; Druid 4
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature
Duration: 3 rounds
Saving Throw: Fortitude half
Spell Resistance: Yes

This spell is the same as creeping cold, but the duration increases by 1 round, during which the subject takes 4d6 points of cold damage. If you are at least 15th level, the spell lasts for 5 rounds and deals 5d6 points of cold damage. If you are at least 20th level, the spell last for 6 rounds and deals 6d6 points of cold damage.