Chaos Terminators that are part of this Formation (including the Terminator Champion) have a WS and BS of 5 rather than 4.
While Abaddon the Despoiler is joined to the unit of Chaos Terminators from this Formation, you can re-roll one Look Out, Sir roll for him in each phase.
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.
