The panel begins to tie in the story back to where we ran into shadowfel, with Xhul’horac.
There was so much good material that never got developed. Why was Gul’dan messing with that? Was it something the Legion asked for? His own lust for power to peer into other dimensions by twisting the methods learned by the Legion?
This begins to hint at N’Zoth’s role in this. What would someone else do with that knowledge – combining fel energy and void to release power (like an Azerothian warp drive combining matter and anti-matter). Such a release of energy might be welcome to a creature that feeds on it to grow. By mastering such a science, one could turn an invading army into an all-you-can-eat buffet.