All in all, Jack's ascendance caused scandals on a universal scale, almost triggering a massive war. The war had also been delayed due to a different phenomenon in the very same ascendance, yet none of it was actually caused due to Jack himself.
The night sky and stars were linked to the curse plaguing the fairies. The disturbance in the night was caused by the Challenge realm, and his proclamation was caused by interference from Bob - Bob who had somehow affected matters far, far beyond his power level.
None of it was because of Jack specifically, though he was not without his own merit. After all, he had set into motion a sequence of events that would forever change the course of history.
One would think that affecting the whole damn universe would be a lot harder, given its size. But it seemed that Lex and Jack just had some skill in that regard - a natural born talent.
Yet to the very end, there seemed to be no phenomenon specifically because of Jack or his actions.