Occult Crescent speculation

[Vallavia]

All these locations are very close together and by all appearances intact; Nym's corner looks a little waterlogged, but that's it. This makes me feel like it might be from before the war; I can't imagine these three (four?) would all be neighbors without blowing each other to bits during the war. We don't actually know the inciting incident of the War of the Magi; maybe this joint colony disappeared and everyone blamed each other?

I thought this was pretty funny, but it does also seem exactly like an Ascian doomsday plot to stir up (at least) three nations of extraordinarily powerful mages to trigger an apocalypse. And there is precedent with Eureka...