You cleverly maneuver your adversary into a perfect flanking position. As you land the deciding blow, your surrounding allies strike hard from all sides.

Daily   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 3[W] + Strength modifier damage, and each ally of yours adjacent to the target can make a melee basic attack against it as a free action.

Miss: One ally of your choice adjacent to the target can make a melee basic attack against it as a free action.

Published in Player's Handbook, page(s) 151, Class Compendium.