Firestorm

Spell level : Innate level: 7, Cleric: 8, Druid: 7
Descriptor(s) : Fire
Components : Verbal and Somatic
Range : Personal
Target/Area : Colossal
Duration : Instant
Save : Reflex 1/2
Spell resistance : Yes

All enemies within this spell's area of effect are inundated with a rain of fire and take 1d6 points of damage per caster level (to a maximum of 30d6). Half of the damage is divine and the other half is fire-based. You gain 40 fire damage per Epic Relevel.