Undead in this case being... well, let me just ask for your definition! It's not a term that means much to me aside from bits I've learned here. My necromancy deals with souls and energies, less so bodies. At least not bodies that aren't formed out of powerful enough spiritual energies.

( Skipping past the possessions, as he's not... particularly... the one who cared to have anything to do with that. He was more into unpossessing people. )

Right, so you're running into an issue with having... tissue that's already died, ah? Something like that? You can't be healed because your body no longer functions like the living?