I am running both of your mods, and I occasionally saw messages about city destruction or the formation of a capital that weren't reflected in any city on Elysium. In my last game I got lucky with gateways and eventually invaded the primal plane, where I found the capital and some city ruins. While the ruins seem like the other mod and I don't really care about them, the capital spawning is supposed to be in this one and it seems like a bug that it can spawn on other planes.

Apologies for the late reply. It is indeed a bug. I need to check the spawn conditions and limit them to the standard Elysium plane.

I just had a magic library upgrade to an academy of higher magic despite an academy already existing on Elysium from start. I had noticed the old wizard spawn in earlier, but assumed the upgrade event would not occur due to the mod description. The preexisting academy was still under NPC control when the upgrade occurred. I am still running both your mods and no other mods.

I've been poking into the code of your mod (there's some neat tricks I've seen that I wanted to see how they were done), and figured I might as well be helpful. Bugs spotted:

Typographical error in line 1589 - "Warlock of Fire" should be "Warlock of Water".

Lines 2249, 2268, 2287, 2306, 2616, 2652, - "+player 28" should probably be "+player 26", unless the cultist of the deep is supposed to be infernal faction and not horrors.

It also runs pretty slow in terms of turn checks; I think heavy use of "+plane 0" will help a lot with that.