Your hollow cry strikes fear into the hearts of the living.
Prerequisites: Undead type, incorporeal subtype, Daunting Presence.
Benefit: You can emit a moan as a standard action. All living creatures within a 30-foot spread must succeed on a Will save (DC 10 + ½ your HD + your Cha modifier) or become shaken for 1 minute. This is a supernatural, sonic, necromantic, mindaffecting, fear effect. A creature that successfully saves against the moan cannot be affected by your moan for 24 hours.
Special: If you already have the frightful moan ability, instead of the normal benefits of this feat, the DC to resist your frightful moan ability increases by 2.
Source: Libris Mortis, page 24.