Fire Storm(Player's Handbook v.3.5, p. 231)
Level: Druid 7, Warmage 7, Blighter 7, Nar Demonbinder 7, Cleric 8, Fire 7,
Components: V, S,
Casting Time: 1 round
Range: Medium (100 ft. + 10 ft./level)
Area: Two 10-ft. cubes per level (S)
Saving Throw: Reflex half
Spell Resistance: Yes
When a fire storm 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 any plant creatures in the area that you wish to exclude from damage.
Any other creature within the area takes 1d6 points of fire damage per caster level (maximum 20d6).