You strike a hearty blow, then unleash an ear-splitting battle cry.

At-Will   ✦     Primal, Thunder, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 1[W] + Strength modifier damage. You then howl in a blast 3 that includes the target. Each enemy in the blast, other than the target, takes thunder damage equal to your Constitution modifier. If you are raging, the thunder damage equals 3 + your Constitution modifier.
Level 21: 2[W] + Strength modifier damage, and add 5 to the thunder damage, whether or not you are raging.

Published in Primal Power, page(s) 11.