Some more suggestions:
- items used could be a forced symbiosis between dead and living
that means: like some creature could've parts that're still alive and some parts that were taken from corpses and everything is held together with magic
- monsters or creatures created by necromancers could be like a Matryoshka doll
They contain other creations inside of them. After killing 1, it bursts open to reveal another and this goes on for 1 to 2 more rounds.
Btw, if the necromancer class doesn't make it, some of these stuff can still make into the game as skills in other classes: the darker types. Also, some of them could also be used for Black Ring members.
