You launch a ferocious attack at your enemy, allowing one of your allies to safely retreat from it.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 2[W] + Strength modifier damage, and an ally of yours adjacent to the target can shift up to 2 squares as a free action.

Published in Player's Handbook, page(s) 78, Class Compendium.