I have been using a particular NPC as a Dead Thrall for a while now. He was an NPC named Kornalus.

Turns out if he gets killed, I can just re-animate him again. Or if I conjure something else (can only have one at a time atm) he falls down dead. Then if I want to, I can re-cast Dead Thrall on him and he will re-animate again. He is fairly awesome with destruction and alteration. I really don't want to lose him, but can't use him all the time (the townsfolk complain constantly about "that kind of magic" whenever I have him with me). I have been leaving his body in the basemant in Hjerim, my house in Windhelm. Yes, in that room. I wonder how long I can leave his body there and still find it if I come back later. I tried one brief experiment: I left him in my basemant in his dead state, fast traveled across Skyrim and back. And he was still there.

Anyone know how long you can leave a body laying around?

Necromancy. It doesn't mean I am a bad person.