The great masters of the Ordo Mortificarum have risen from the ranks of the Necromagi, and each is personally ordained by the emperor as a Mortifex.
Such individuals have spent so much time among the dead that they shun the living, and the soul of the Mortifex is so steeped in undeath, delving into the dimensions of the afterlife, that their bodies begin to decay and they are no longer living beings.
Mortifexes are not mere esoteric recluses; they are battle-hardened mages, and are consequently able to cast spells even in melee. Such exalted individuals are always accompanied by followers who will step in the way of incoming blows.
As the Mortifex destroys an enemy, he is able to energize himself, expanding his consciousness, gaining access to special talents he has burned into his unconsciousness.
These warlords are designed to lead warbands of undead. For best results they should be surrounded with units of Legio Mortum and backed up by Molochs.
Their spells and Ancestral Rites abilities increase the effectiveness and resilience of all undead models in the warband.