Frightful Presence( Ghostwalk, p. 33)
Your very presence can cause others to be stricken with fear.
You gain frightful presence as an extraordinary ability. You can activate the ability as a free action whenever you attack, charge, or fly overhead. Creatures with fewer Hit Dice than you that are within a radius of 30 feet are subject to your frightful presence and must succeed on a Will saving throw (DC 10 + 1/2 your HD + your Cha modifier). Creatures with less than half your Hit Dice that fail are panicked for 2d4 rounds, and those with more than half your Hit Dice that fail are shaken for 2d4 rounds. This is a mind-affecting, fear effect. A creature that successfully saves against your frightful presence cannot be affected by it for one day. Each time you use this ability, you deal 2 points of Charisma damage to yourself.