Champion of the Labyrinth Attack 11Dead End Strike
You smite your foe with an attack and are prepared to spring if it should run.
Standard Action Melee or Ranged weapon
Target: One creature
Attack: Your highest ability vs. AC
Hit: 2[W] + your highest ability modifier damage. In addition, if the target moves before the start of your next turn, you can shift your speed to a square adjacent to the target as an opportunity action. If you do, the target takes 5 damage and ends its movement.
Published in Dragon Magazine 385, page(s) 22.