You slam your weapon against the ground, bringing forth primal energy that causes the earth to batter your foes and churn beneath their feet.

Encounter   ✦     Primal, Weapon
Standard Action      Close burst 1

Target: Each enemy in the burst

Attack: Strength vs. Fortitude

Hit: 1[W] + Strength modifier damage.

Effect: Until the end of your next turn, each square in the burst is difficult terrain for your enemies.

Published in Player's Handbook 2, page(s) 155.