When an enemy tries to slip away, you and a companion hunter close in for the kill.

Encounter   ✦     Primal
Immediate Reaction      Personal

Trigger: An enemy marked by you ends its turn farther from you than where it started its turn

Effect: You and one ally can each shift half your speed as a free action to squares closer to the triggering enemy.

Published in Primal Power, page(s) 110.