Prerequisites: Breath weapon
You may expend your breath weapon in a continuous way as a Quick Action, such that any successful Bite attack also deals your breath weapon damage (no save). The slow exhalation of your breath weapon may be maintained for a number of rounds equal to your Constitution modifier if your breath weapon is cone-shaped, or half that duration if it is line-shaped. Once you complete your slow exhalation, you must wait 1d4 rounds as normal before using your breath weapon again.