Completely disappeared without a trace. And deserters, who should have been brought back from previous installments of Heroes.

Nazg)), don't worry, no one was trying to offend you)) Ar, good job, you corrected your mistake) and ghosts are not corpses, because they are immaterial) they are creatures from the afterlife. so it's not that simple)
Wolf, this will be a parody and plagiarism of Lord of the Rings, and that's not cool. Undead are like the Nazgûl (Knight, calm down:))
Gilnit, Undead are not tormented souls; the description says they are avatars of death. although I don't remember the usual description. they might be souls.