Electric Vengeance Greater

Evocation [Electricity]
Level: Sorcerer 2, Wizard 2,
Components: V, S,
Casting Time: 1 immediate action
Range: 5 ft.
Target: One creature
Duration: Instantaneous
Saving Throw: Fortitude partial
Spell Resistance: Yes
Source: Player's Handbook II

This spell functions like electric vengeance, except as noted here. This spell deals 5d8 points of damage +1 per caster level (maximum +15), and the target of the spell must succeed on a Fortitude save or be dazed until the end of your next turn.