Librarian in Phobos Armour

Before the battle, in the Muster Armies step, for each leader and support unit in your army, you can select one friendly bodyguard unit that unit can lead. That unit will then lead that bodyguard unit for the battle and form an attached unit with it. Unless otherwise stated, each bodyguard unit can only have one leader unit and one support unit attached to it.

Each time this unit makes an **ingress move** (20.04), if every model in this unit has this ability, it can be set up anywhere on the battlefield that is more than 8" horizontally from all enemy units, even if that is within your opponent’s deployment zone.

At the start of your Command phase, you can select one Combat Doctrine listed below. If you do, that Combat Doctrine is active for friendly ADEPTUS ASTARTES units with this ability until the start of your next Command Phase


Assault Doctrine
When this unit is selected to make an Advance move, that Advance move does not prevent this unit from being eligible to declare a charge. 


Devastator Doctrine
This unit's ranged attacks have [ASSAULT]


Tactical Doctrine
When this unit is selected to make a Fall-back move, that Fall-back move does not prevent this unit from being eligible to shoot and eligible to declare a charge. 


Unless otherwise stated. 
- You can only select each Combat Doctrine once per battle
- Only one Combat Doctrine can be active for each unit. If a rule make a Combat Doctrine active for a unit, any Combat Doctrine previously active for that unit is no longer active for that unit. 

This ability always takes the form **Scouts X"**. In the Resolve Pre-battle Abilities step, if every model in a unit has this ability, you can do one of the following: 
- If that unit is in **strategic reserves**, you can set up that unit anywhere that is wholly within your deployment zone. 
- If that unit is wholly within your deployment zone, it can make a **scout move**. 
- If that unit is embarked within a **DEDICATED TRANSPORT** that is wholly within your deployment zone, and if every model embarked within that **DEDICATED TRANSPORT** has the Scouts ability, that **DEDICATED TRANSPORT** can make a **scout move**.

Adeptus Astartes Psyker units with this ability have a psyker level of 1 of higher, specified in that unit's abilities. Each Psychic ability has a psychic level of 1 or higher, specified in that ability's name. 


In a battle round, a friendly ADEPTUS ASTARTES PSYKER unit can use a number of psychic abilities whose total psychic level does not exceed that PSYKER unit's psyker level

If every model in a unit has this ability, each time a ranged attack targets that unit, that unit has the **benefit of cover** against that attack (13.08).

During deployment, if every model in a unit has this ability, it can be set up anywhere on the battlefield that is more than 8" horizontally from your opponent’s deployment zone and all enemy units.