Your rage engenders fear in your opponents.
Prerequisites: Rage or frenzy ability.
Benefit: While you are raging, you designate a single foe within 30 feet of you that you can attempt to demoralize as a free action (see the Intimidate skill. A foe that you successfully demoralize remains shaken for as long as you continue to rage. You may only use this feat against a single foe in any particular encounter.
Source: Complete Warrior, page 102.