Voice from the Depths (Epic)

Your warcry can be heard clear across a battlefield.

The Gates of Hell (Dice Freaks)

Grimoire of Cosmic Entities Volume One By Eli Atkinson, William Church and Serge W. Desir, Jr.
Original Concept by Serge W. Desir, Jr.

Full netbook can be found on the following website

Dicefreaks d20 Community

• Prerequisites: Knowledge (history) 24 ranks, warcry class ability.
• Benefit: All allies within 100 feet benefit from your warcry.
• Normal: All allies within 30 feet benefit from your warcry.
• Special: If you have both this feat and Intimidating Warcry, only enemies within 30 ft. are affected.