When scrying the aethyrs from TEX to NIA, there seems to be a fairly steady line of developments in which you could almost write a continuous story from it, but it changes when you get to NIA, I have been trying to understand why before I proceed.

Will it only become clear after I proceed?

Does it seem to change a lot for everyone at NIA or does the story change for some people on other aethyrs?

Is it different each time you start the journey from TEX?

Would prefer answers from members who have actually done this rather than mere speculation please.