Chainbinder Utility 12Dance of the Flail
You force your enemy to move against its will, allowing a nearby ally to lash out at it.
Daily Martial, Stance
Minor Action Personal
Effect: Until the stance ends, whenever you attack with a flail and pull, push, or slide an enemy, one of your allies adjacent to that enemy at any point during the forced movement can make a melee basic attack against it as a free action.
Published in Martial Power 2, page(s) 100.