Your dragon bite can also badly burn your opponents with fire or acid.

Prerequisite(s): Con 13, 6th-level dragon disciple, must have a fire or acid dragon type bloodline

Benefit: When you successfully deal fire or acid 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). If the target fails its saving throw, it continues to take 1d6 fire or acid damage (as appropriate) on its turn for 1 round per three dragon disciple levels you possess.