Your dragon bite can also stun your opponents with cold or electricity.
Benefit: When you successfully deal cold or electricity damage to an opponent with your bite attack, you can as a swift action require your target to make a Fortitude save (DC 10 + your dragon disciple level + your Constitution modifier) or become stunned for 1 round. You can use this ability a number of times per day equal to your dragon disciple level. A target that succeeds with its saving throw becomes immune to this ability for 24 hours.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.