A Necromancer summoning the souls used to power his craft.
Utilize magic revolving around the dead
The power to utilize magic involving the dead, life-force and/or souls. Practitioners of this trade are known as Necromancers. A form of Magic and Dark Arts.
The user's magical abilities revolve around manipulating the dead, death, the life-force and/or souls for good (i.e., resurrecting the dead), evil (in various ways) or neither. Users can also use communicate with the deceased – either by summoning their spirit as an apparition or raising them bodily – for the purpose of divination, imparting the means to foretell future events or discover hidden knowledge.
Many practitioners find a way to cheat death one way or another, whether by becoming some form of undead creature or by bypassing their own ability to die.