Magicians use Necomancy to call upon the suffering souls that were denied by heaven and those who rested themselves upon the burning fires of hell. It can also open the gates to Hades, and bring the power of sleeping heroes to bear.
The following is inscribed in the ancient grimoire:
"The magic calls upon those who does not exist, and therefore fear the embodiment of nature's laws."
The "embodiment of nature's laws" refer to the magic of Glamour and its familiars; explaining why Necromancy is weak to Glamour.
The teacher of Necromancy is Opalneria Rain.