You become a blur of motion, raining a series of blows upon your opponent.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC. Make the attack twice against the target.

Hit: 1[W] damage.

Weapon: If you're wielding a flail, a light blade, or a spear and have Dexterity 15 or higher, make the attack a third time against either the target or a different creature.

Published in Player's Handbook, page(s) 79, Class Compendium.