Deep Strike During the Declare Battle Formations step, if every model in a unit has this ability, you can set it up in Reserves instead of setting it up on the battlefield. If you do, in the Reinforcements step of one of your Movement phases you can set up this unit anywhere on the battlefield that is more than 9" horizontally away from all enemy models.
If a unit with the Deep Strike ability arrives from Strategic Reserves, the controlling player can choose for that unit to be set up either using the rules for Strategic Reserves or using the Deep Strike ability.
For The Greater Good If your Army Faction is **^^T’au Empire^^**, at the start of your Shooting phase you can select units from your army with this ability to become Observer units.
During your Shooting phase, for each Observer unit from your army that has not been selected to shoot this phase and is eligible to shoot (excluding **^^Fortification^^** and Battle‑shocked units) select one enemy unit that is visible to be marked as their Spotted unit until the end of the phase. Each enemy unit can only be marked as a Spotted unit once per phase.
Units from your army with the For the Greater Good ability (excluding Observer units) are Guided units while targeting one or more Spotted units.
Until the end of the phase, each time a model from your army in a Guided unit makes an attack that targets a Spotted unit, improve the Ballistic Skill characteristic of that attack by 1 and, if the Spotted unit was marked by an Observer unit that has the Markerlight keyword, that attack has the **[IGNORES COVER]** ability.