Crimson droplets splatter as you slash into all nearby foes.

Daily   ✦     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 (main weapon and off-hand weapon), two attacks per target

Hit: 1[W] + Strength modifier damage per attack. If you hit a target with one weapon, it takes ongoing 5 damage (save ends). If you hit a target with both weapons, it takes ongoing 10 damage (save ends).

Miss: Half damage per attack, and no ongoing damage.

Addition (7/28/2008)
Add: "Requirement: You must be wielding two melee weapons." before Target

Published in Player's Handbook, page(s) 111.