Greater Mighty Roar

(Savage Species, page 35, DnD 3.0)

[Monster]

You unsettle opponents with a dreadful roar as you attack.

Prerequisite

Mighty Roar, Animal or magical beast; Large size

Benefit

This feat functions like Mighty Roar, except that each opponent that fails a Will save (DC 10 + 1/2 your Hit Dice + your Cha modifier) is panicked for 2d6 rounds. A panicked creature takes a -2 morale penalty on attack rolls, saves, and checks, has a 50% chance to drop what it is holding, and runs away from you as quickly as it can. The effects of being panicked supersede the effects of being shaken.