Like a whirling cyclone of death, you spin and strike one foe after another, driving each one back and knocking it to the ground.

Encounter   ✦     Martial, Weapon
Standard Action      Close burst 1

Target: Each enemy you can see in the burst

Attack: Strength vs. AC

Hit: 1[W] + Strength modifier damage, and you can push the target 1 square and knock it prone.

Published in Player's Handbook, page(s) 83, Class Compendium.