Needs review
Source: Complete Warrior

Description: Your rage engenders fear in your opponents.

Prerequisites: Rage or Frenzy ability

While you are raging, you designate a single foe within 30 feet of you that you can attempt to demoralize as a free action. 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.