Fireburst, Greater(Spell Compendium, p. 94)
Level: Sorcerer 5, Wizard 5,
Components: V, S, M,
Casting Time: 1 standard action
Range: 10 ft.
Effect: Burst of fire extending 15 ft. from you
Saving Throw: Reflex half
Spell Resistance: Yes
This spell functions like _fireburst, except that it affects creatures within 15 feet of you and deals 1d10 points of fire damage per caster level (maximum 15d10).