Fire Storm (Invocation/Evocation)
Level: Cleric 7, Druid 7
Sphere: Elemental (fire)
Range: visual range of the caster
Duration: 2 rounds
Casting Time: 1 round
Area of Effect: 40-foot cube
Saving Throw: 1/2

When a firestorm spell is cast, the whole area is shot through with sheets of roaring flame. The raging flames do not harm natural vegetation, ground cover, and plant creatures in the area, if the character so desires. Any other creatures (and plant creatures the character wishes to affect) within the area take 1d6 points of fire damage per caster level (maximum 20d6).