You are making some rather authoritatively definitive statements which have yet to be seen in any of the *released* episodes. Such as Necrafa's fate, as well as that of the Original Dragonmage. Where are you getting these from?
So far as we KNOW from aired canon episodes, they both disappeared when DM unleashed the Star Dragon. We don't KNOW that either survived or in what realm they might currently be. Necrafa cannot be considered as *revived* until she returns to the Realm of Gemina. As far as we know, she could *could* be in a Realm of the Dead or another type of Underworld.
And all we know is that the Original Dragonmage was no longer physically present afterward. At least, we were not shown her body like we saw (still living) General Dreadbane's.