Heighten Breath

(Draconomicon, page 70, DnD 3.5)

[Metabreath]

Your breath weapon is even more deadly than normal.

Prerequisite

CON 13, breath weapon

Benefit

You can increase the save DC of your breath weapon by any number up to a maximum equal to your Constitution bonus. For each point by which you increase the save DC, add +1 to the number of rounds you must wait before using your breath weapon again.