You can use your breath weapon one more time per day than normal.
Prerequisites: Dragonblood subtype, breath weapon with limited uses per day.
Benefit: You can use your breath weapon one additional time per day. The interval you must wait between breaths is 1d4 rounds.
Special: You can gain this feat multiple times. Each time you take it, you can breathe one additional time per day.
Source: Races of the Dragon, page 102.