[Anguirel]

I do rather like this theory. Nice and quite Gothic, this cosmic corpse reanimation.

On the other hand, the logic of Tolkien magic often deals with permanent, irreversible diminution; on the evil side sometimes to do with a vague sense of punishment by, ish, Eru. Morgoth got left with a permanent limp by Fingolfin, Sauron could be Annatar, fair of face, no longer after Numenor was drowned, that sort of thing...