You unleash the fury of the heavens. Thunder, lightning, and driving razored sleet sear flesh, melt shields, and blast armored plates to shards.

Daily   ✦     Arcane, Implement, Thunder
Standard Action      Area burst 3 within 20 squares

Target: Each creature in the burst

Attack: Intelligence vs. Fortitude

Hit: 4d6 + Intelligence modifier thunder damage.

Effect: Each target grants combat advantage to your allies until the end of your next turn.

Published in Forgotten Realms Player's Guide, page(s) 69.