You slam your weapon into the ground, causing the earth to toss and churn as if from an earthquake.

Encounter   ✦     Primal, Weapon
Standard Action      Close burst 1

Target: Each enemy in the burst

Attack: Strength vs. AC

Hit: 1[W] + Strength modifier damage, and the target cannot shift until the end of your next turn.

Published in Player's Handbook 2, page(s) 157.