Just when everyone thought that the undead mercenary group had no chance of making a comeback, the last Black Mage of the undead mercenary group actually used the last of his life force to stimulate ten times the mana and turn the other seven dead Black Mages into high-level undead creatures. Before he died, he ordered the seven undead creatures to use black magic to turn him into an undead creature.
If a Black Mage turned a person into an undead creature, that person would become his slave. An ordinary low-level undead creature had no intelligence and was very weak, but a high-level undead creature had strong combat power and high intelligence. If the Black Mage died, the person he turned into an undead creature would become a free undead creature and would no longer be restrained.
