Your attack positions your enemy so that no matter where it turns, one of your allies is waiting.

Daily   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 3[W] + Strength modifier damage.

Effect: Until the end of the encounter, the target cannot shift if at least two of your allies (or you and one ally) are adjacent to it.

Published in Player's Handbook, page(s) 146, Class Compendium.