Fortress of Discipline
(Rule)Description: The Battlehost must inlcude 1-3 units of War Walkers or a single unit of Wasp Assault Walkers. When a unit of War Walkers or Wasp Assault Walkers chosen as part of this Formation fires at an enemy unit already targeted by an Eldar Guardian unit, from the same Formation in that Shooting phase, it gains the Pinning special rule for that attack.