Chief Librarian Mephiston

Unless part of an **attached** unit, this unit is not **visible** to enemy models unless they are within 12" of this unit, and it cannot be targeted by **[INDIRECT FIRE]** weapons unless the attacking model is within 12" of this unit. 
If this ability takes the form **Lone Operative X"**, unless part of an **attached** unit, this unit is not **visible** to enemy models unless they are within **X"** of this unit, and it cannot be targeted by **[INDIRECT FIRE]** weapons unless the attacking model is within **X"** of this unit.

While every model in a unit has this ability, that unit is a **Fights First** unit. 
See the Resolve Fights First Combats step in the Fight phase (12.04).

This ability always takes the form **Feel No Pain X+**. Each time a model with this ability would lose a wound, roll one D6: on an **X+**, that wound is not lost. 

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 If a rule make a Combat Doctrine active for a unit, any Combat Doctrine previously active for that unit is no longer active for that unit. 

At the start of the battle round, if a model with this ability is your WARLORD, gain 1 CP