Advanced Class Guide pg. 172
Aggressive Thundercloud, Greater
Flying storm cloud deals 6d6 electricity damage.
evocation [electricity, sonic] \ \
arcanist 4, druid 4, hunter 4, magus 4, sorcerer 4, witch 4, wizard 4-level
Save: Reflex negates and Fortitude negates
SR: yes
Casting time: 1 standard action
Range: medium (100 ft. + 10 ft./level)
Duration: 1 round/level
Effect: 5-ft.-diameter sphere
Componenent: V, S, M/DF (a piece of a tree struck by lightning)
Description
This spell functions as aggressive thundercloud, except it deals 6d6 points of electricity damage to any creature it strikes. The first creature damaged by the cloud is also stunned for 1 round (Fortitude negates this is a sonic effect.