Detonate

School evocation [acid, cold, darkness, electricity, fire, light, or sonic]; Level alchemist 4, bloodrager 4, magus 4, sorcerer/wizard 4
CASTING
Casting Time 1 standard action
Components V, S, M (two vials; one containing acid and one containing an alkaline solution worth a total of 50 gp)
EFFECT
Range 30 ft.
Area 30-ft.-radius spread centered on you
Duration Instantaneous
Saving Throw Reflex half; Spell Resistance yes
DESCRIPTION
You flood yourself with a potent surge of energy and then energy explodes from your body.

When this spell creates the explosion of energy, choose one of the following these energy types: acid, cold, dark, electricity, fire, light, or sonic. The explosion inflicts 1d8 points of damage of that energy type per caster level to all creatures and unattended objects within 30 feet. You automatically take half damage from the explosion, without a saving throw, but any other energy resistance or energy immunity effects you may have in place can prevent or lessen this overflow damage caused by the explosion.