Use this Stratagem at the end of your Movement phase. Select one BURROWERS unit or unit that can FLY from your army. Remove that unit from the battlefield. In the Reinforcements step of your next Movement phase, you can set that unit back up anywhere on the battlefield anywhere that is more than 9" away from any enemy models. If the battle ends and that unit is not on the battlefield, it is destroyed. A unit cannot be selected for this Stratagem if it was set up on the battlefield this turn.