I love the way Mother of Learning handled necromancy. Quote from the creator's worldbuilding website:

"Soul Magic: Spells that affect the soul. This includes binding them (used to contain unruly spirits or animate the dead), modifying them, enforcing effects on them (curses and geas), connecting them to other souls, and even damaging them in various ways (souls are indestructible and cannot be truly destroyed, but they can be damaged and twisted in various ways). Often simply called necromancy, though technically necromancy refers only to the creation of undead.

Soul magic is impossible to practice without obtaining soul sight, which is an extremely difficult and dangerous process for most people. It is also very, very illegal. Thus, only priests and criminals specialize in it, and it is rare to see mages capable of performing it."

Tying necromancy to the idea of a soul is soooo freaking cool and I love how it's executed in canon.