Marks of Chaos

When mustering your army, when you select a Heretic Astartes unit to include in your army, if that unit is not an Epic Hero and does not already have one of the following keywords, you must select one for that unit to gain and note it on your Army Roster: Khorne, Tzeentch, Nurgle, Slaanesh, Chaos Undivided.

Each time a unit with one of these keywords gains a weapon ability as the result of a Dark Pact and does not fail the resulting Leadership test, until the end of the phase, that unit gains the associated ability below.

RESTRICTIONS

• You cannot select the Khorne keyword for a Psyker unit.
• A Character unit can only be attached to a unit if both units share the same keyword from the list below.
• A unit can only embark within (or start the battle embarked within) a Transport if both of those units share the same keyword from the list above.’