You whirl around with blades outstretched, slashing your foes across the legs and causing them to fall to the ground in mewling heaps.

Encounter   ✦     Martial, Weapon
Standard Action      Close burst 1

Requirement: You must be wielding two melee weapons.

Target: Each enemy in the burst you can see

Attack: Strength vs. AC

Hit: 1[W] + Strength modifier damage, and you knock the target prone. The target is immobilized until the end of your next turn.

Revision (10/14/2009)
Replace the Hit line with the following: “Hit: 1[W] + Strength modifier damage, and you knock the target prone. The target is immobilized until the end of your next turn.”

Published in Player's Handbook, page(s) 110.