You can call on the powers of hell and the abyss with your orations, and the barbarians you call are reminiscent of a fiendish host.
Benefit: The barbarians you summon with your call down the legends and lay of the exalted dead class abilities gain the fiendish creature template. Additionally, their attacks are considered evil-aligned for purposes of overcoming damage reduction and each attack they make deals 1 additional point of fire damage per level of pathfinder chronicler you possess. Finally, the DC for good creatures to resist your bardic music effects made with the Perform (oratory) skill increases by 2, or by 4 if the creatures are good outsiders.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.