Endless Hatred Units that have the VotLW special rule have the Hatred special rule, and can re-roll failed To Hit rolls in every round of close combat when attacking units that contain any models from the Armies of the Imperium.
Black Legion The armies of the Black Legion have no equal among other Chaos Space Marines, as each warrior is a veteran of ten millennia of bloodshed. If you wish, you can say that any Chaos Space Marines Detachment or Formation is also a Black Legion Detachment or Formation.