Transmutation [Light]
Level: Sorcerer 4, Wizard 4
Components: S
Casting Time: 1 swift action
Range: Personal
Target: Your breath weapon
Duration: 1 round
You expel your breath weapon, which crackles with eye-splitting intensity.
This spell functions like breath flare, except that targets that fail their saving throws against your breath weapon are permanently blinded, rather than dazzled.
Source: Spell Compendium (Page 31)