--
The Young Dragon Patriarch already realized that he won't be able to drag this monstrosity down with him. It pained him to know that this thing never took him seriously at all.
But since it desires him so bad, the worst thing he could do to, at the very least, get some vengeance, was to make sure that it wouldn't get anything from him. That's what led him to this decision.
And this was a great plan...or conclusion to this. He thinks that at least this way, he wouldn't be used into anything nefarious planned by the void. He's just hoping that his death wasn't completely meaningless, and that those who will see his memory would learn something out of it.
OouuuUooo!
But alas...it was too fast and too smart.