@Dead Cruiser: Well, I wasn't sure if to bring this up since it's not entirely fleshed out, but necromantic spells in my setting are "colorless". They don't involve an affinity and, well... they're not like you seem to think. They can summon and communicate with ghosts and spirits, but not control them, and reanimate dead flesh.

@TheFake: Hmm, alright, that's probably okay.