You open your palm, revealing a sphere of arcane energy that speeds across the battlefield and detonates, leaving your foes thunderstruck.

Encounter   ✦     Arcane, Implement, Thunder
Standard Action      Area burst 1 within 10 squares

Target: Each creature in the burst

Attack: Charisma vs. Fortitude

Hit: 2d8 + Charisma modifier thunder damage, and the target is slowed until the end of your next turn. If the target is in the origin square of the burst, it is immobilized until the end of your next turn instead of slowed.

Published in Arcane Power, page(s) 32.