Regular gaze attack?
Draining Gaze (Su): energy drain, 2 negative levels, 30 feet, Fortitude DC X negates. The save DC is Charisma-based.
Want to do an aura for the fear?
You know, looking back at the description, there should be some kind of exorcism against these, but we should probably up the ante in terms of how powerful the spells need to be.
Skills: Bluff +7, Hide +18, Intimidate +13, Listen +15, Move Silently +8, Search +4, Spot +15, 20 more ranks
Feats: Cleave, Combat Reflexes, Improved Initiative (B), Lightning Reflexes (B), Power Attack, 2 more