Since you know the deadites are demon spirits who can possess living humans and turn them into demons, imagine if Karass and his pal Merrin can do to take care of the deadites?
Since you know the deadites are demon spirits who can possess living humans and turn them into demons, imagine if Karass and his pal Merrin can do to take care of the deadites?
Things might go awry once they find out they're not dealing with a 12 year old girl who is restrained on a bed.
I'm not sure he could do anything really. Different mythology. I think he'd likely just be possessed himself and become a deadite.
The excorcism process is slow. Even assuming it works on a radically different species of demon, the deadite really has no reason to give him the time needed to do it. It would just bum-rush them and kill them.