Torrential Storm
Druid Attack 17
Dark clouds gather at your command. Lightning and rain fall to damage your foes and keep them away from you.
Close blast 5
Target: Each creature in blast
Attack: Wisdom vs. Fortitude
Hit: 3d6 + Wisdom modifier lightning damage, and you slide the target 3 squares.
Effect: The blast creates a stormy zone that lasts until the end of your next turn. A creature hit by this attack that enters the zone on its turn takes 10 lightning damage.
Torrential Storm is a 17th level Druid encounter power. It creates a zone of damaging lightning, as well as slide the target. [PrP:48]