Battle Captain Attack 20Cunning Flurry

You whirl around like a cyclone of steel terror, slashing at foes. With each landed blow, you knock your enemy prone or send it stumbling backward.

Daily        Martial, Weapon
Standard Action      Close burst 1

Target: Each enemy you can see in the burst

Attack: Strength vs. AC

Hit: 2[W] + Strength modifier damage, and you either push the target 1 square or knock it prone.

Miss: Half damage.

Published in Player's Handbook, page(s) 154, Class Compendium.