Electric Vengeance, Greater

(Player's Handbook II)

Evocation [Electricity]
Level: Sorcerer 5, Wizard 5,
Saving Throw: Fortitude partial

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.