Intimidating Rage

 
Prerequisite(s): Ability to Rage
 
Benefit: While you are raging, you designate a single foe within 30' of you. This creature must make a Will check against DC = 10 + 1/2 your character level + your Charisma modifier. If they fail, they suffer a -2 morale penalty on all rolls.
 
Special: Creatures immune to fear or without sight are immune to this effect.
 
Source: Complete Warrior