The Necromancer is arguably more of a Freak than the Shapeshifter in terms of game balance. How is he stopped?
The Necromancer is indeed a “freak,” for he has willingly sold his soul to the Dark Earth Mother, Chthon, in return for a key to the Pit. The Necromancer has the infernal presence to bully or coerce the creatures of the Pit unto his service. The limitation to this fantastic power is the Necromancer’s common sense. The creatures of the Pit exist in an eternal hierarchy which just happens to include the Necromancer himself, and in this hierarchy of evil the stronger creatures of the Pit do not take kindly at all to the notion of a mere earthbound mortal usurping their own place in the Pit. So when a Necromancer begins to impose his will on the creatures of the Pit, they take notice and remember, as do their more powerful masters. So while a Necromancer will probably be able to force a powerful demon unto his service for the span of one year and one day, the demon, as well as its masters, will mark the Necromancer in most horrible ways; perhaps as a future victim of their own dark plans,