Quote Originally Posted by ZerglingOne View Post
That's assuming the soul of an already chaotic evil creature who registers pretty high on the kilonazi scale needs to be replaced by a new one.
The way vampirism works has little to do with the strength of the evil of the previous soul. According to The Giant, all vampires are formed the same way and it is one of the respective god of death's duties to put the negative energy spirit into the new vampire.