Hellrime Blast

Warlock Invocation
Level: Lesser, 4th lv.
Components: V, S
Casting Time: 1 standard action
Range: 60 feet
Duration: Instant
Saving Throw: Fort
Spell Resistance: Yes

This eldritch essence invocation allows you to change your eldritch blast into a hellrime blast. A hellrime blast deals cold damage. Any creature struck by the attack must make a Fortitude save or take a –4 penalty to Dexterity for 10 minutes. The Dexterity penalties from multiple hellrime blasts do not stack.

(Complete Arcane, Page 134)