You breathe out a blast of energy. Creatures in the affected area take 1d6 points of energy damage per caster level (maximum of 12d6). A successful Reflex save results in half damage. The spell's effect and energy type depend on the type of dragon scale used:
The spell's duration changes to 1 minute/level or until discharged.
You can use the breath weapon up to three times during this duration. On the round you cast the spell, using the breath weapon is a free action; later uses require a standard action. You must wait 1d4 rounds between each use of the breath weapon. All uses for A particular casting have the same range, area, and energy type.
You can have only one dragon's breath spell in effect at a time; casting a new one ends the previous one.
Section 15: Copyright Notice - Advanced Player's Guide