In your Command phase, select one or more ADEPTUS MECHANICUS units from your army (including units that are embarked within TRANSPORTS). The maximum number of units you can select depends on the battle size, as follows:

Until the start of your next Command phase, those units gain the HALO OVERRIDE keyword. Then, select one of the Override abilities below. Until the start of your next Command phase, units from your army with the HALO OVERRIDE keyword have the selected Override ability:

Add 2" to the Move characteristic of models in this unit.

Add 1 to the Toughness characteristic of models in this unit.

This unit is eligible to declare a charge in a turn in which it Advanced.

Models in this unit have the Stealth ability.