You are almost as terrifying as a true dragon.
Benefit: Whenever you use your breath weapon or claw attacks or fly over an opponent, you may take a swift activation to scare opponents within 30 feet. Opponents within that range must make a Will save (DC 10 + your dragon disciple level + your Charisma modifier) or become shakened for 1 round per level of dragon disciple you possess. Creatures with 5 or more Hit Dice fewer than you become frightened instead. Creatures that are subjected to this effect become immune to it for 24 hours.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.