Quote Originally Posted by EdwinLi View Post
I'm still betting that it has something to do with Ishgard in some way or at least something inside or below Ishgard causing it.

Every single hypothesis I have about her weakening points to Ishgard being part of the problem in some way but guess we will find out in 3.0.
It's the Ascians/Zodiark and the primals. It's mentioned that the primals "damage the land," which I take to mean as them diminishing hydaelyn because they draw from the same food source.