I'm very disappointed no one is considering my point of view. Jyg is the inverse of Sheo, right? Sheo is a remnant of Lorkhan, a Padomaic echo created when the heart was ripped from lorkhan. Therefore, Jyg (sheo's antithesis), is an Anuic echo of Auri-el - created, most likely, when Alessia and the selectives attempted to rip the time god asunder. He's the remainder, just like sheo. But his very existence, his continuation of being, is a violation of his sphere, his nature - stasis/anu. I believe following the events of SI, he attempted something between the leaping of the magna-ge and the reversal of subgradience of the dwemer and retroactively uncreated himself, and effectively creating a backwards flux of instability/change in the entire universe, or at the least the outer realms, (what else would happen if the god of order uncreated himself?) allowing for such events as the invasion of Mehrunes Dagon, the sundering of Sheo and himself, the weakening of Azura and her banishment, etc.
Maybe I'm all wrong. But maybe i'm not.
Actually, I thought this anolysis was quite nice when you first posted. I just forgot to say so. I don't know about the uncreation part, but Jyg as an Auriel echo in counterpart to Sheo as a Lorkhan echo is good. Although, I don't think we need any other event to have caused it aside from the sundering of Lorkhan from his Heart. 'Cause, after all, Auri=Lork, so it ought to be a traumatic event for both. My opinion on
that is that somewhere on Nirn the hole is sitting around that once held the Heart. *coughEternityWoundcoughcoughUIAHRAANcoughcoughcough*