If your Army Faction is ^^**Heretic Astartes**^^, each time a unit with this ability is selected to shoot or fight, it can make a Dark Pact. If it does, it must first take a Leadership test before any effects of the Dark Pact are resolved; if that test is failed, that unit suffers D3 mortal wounds. Then, select one of the following abilities for that unit’s weapons to gain until the end of the phase:
■ [LETHAL HITS]
■ [SUSTAINED HITS 1]

Leader

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.

Profiles:

Abilities
Leader: This unit can be attached to the following unit: ■ TRAITOR GUARDSMAN SQUAD
Brutal Example: Once per turn, while this unit is leading a unit and contains a TRAITOR ENFORCER model, you can target that unit with the Fire Overwatch Stratagem for 0CP, and can do so even if you have already targeted a different unit from your army with that Stratagem this phase. Each time you use this ability, one Bodyguard model in that unit is destroyed.
Mutated Bodyguard: While this unit contains a Traitor Ogryn model, CHARACTER models in this unit have the Feel No Pain 4+ ability.