D&Dtools1

Benefit

You can spend a turn or rebuke undead attempt or a turn or rebuke elementals attempt as a standard action to create a 15-foot cone of fire that deals 1d6 points of damage per 2 cleric levels (minimum 1d6 points). A successful Reflex save i DC 10 + 1/2 your cleric level + your Cha modifier) halves this damage. Half of this damage is fire, while the remainder is sacred damage (to which resistance or immunity to fire does not apply). If your effective cleric level for the purpose of turning or rebuking is higher than your actual cleric level (for instance, if you are a paladin), use that value instead.

Special

If you have the Draconic Heritage feat or if you are a half-dragon, the extra damage is of the energy type (acid, cold, electricity, fire, or sonic) that corresponds to your heritage or your draconic parent instead. If your feat or your parent is not associated with one of these energy types, this feat has no effect for you.