Evocation [Fire]
Level: Sorcerer 5, Wizard 5
Components: V, S, M
Casting Time: 1 standard action
Range: 10 feet
Effect: Burst of fire extending 15 ft. from you
Duration: Instantaneous
Saving Throw: Reflex half
Spell Resistance: Yes
Greater fireburst causes a powerful explosion of flame to burst from you, damaging anyone within 15 feet of you. All creatures and objects within that area, except for you and any creatures or objects that share your space, take 1d10 points of fire damage per caster level (maximum 15d10).
Material Component: A bit of sulphur.
Source: Spell Compendium (Page 94)