It seems it doesn't work this way right now (or at least it didn't two patches ago).
Found it!
When I compressed unitinfos, unfortunatelly -1 minlevel that was supposed to block this and some other promotions to be avaliable at levelup no longer worked. Or at least not correctly. I think I have fixed it. Plus made some other changes to this promotion.
So, sheut stone promotion will require sheut stone resource and necromancy tech. Once both are gained all units with combat type save from ships and spies will automatically and for free get the promotion. But it will be lost if the resource is lost.
I hope you like it. Currently I do not think there is a standard way to get it (that applies to FfH as well), not even via event.
Nice work

Are you sure about Scions getting 2 population in every city ? Spamming cities is already good stategy for them, and it makes it a lot better. I love their new worldspell

Much, much better then previous one
I am not - the change is mostly for performance/OOS trobleshoting. But I figured that it is not a big deal - standard civs can easily get city to size 2, Scions need awakened.
City spam is good for most civs, and only a bit worse for khazad. Scions benefit even more from conquest.
I may be wrong though.
More critical though, I just updated to M, and now, while my existing save games load, they CTD at the beginning of the next turn.
i also had my existing games crash at the start of the next turn
i started another game and it also reached a point where it crashes at the end of the turn. i guess that whatever it is that's causing the crash was already in my original save when i upgraded from 'l' to 'm', and when i started a new game it was fine until this same thing has been built again. i've attached both saves if it's any help
Did anyone managed to continue game using new patch? It seemed fine, but I did not test it that much - just a turn or two.
CladInShadows, your second save did not crash for me when I have checked. But it can be caused by what I said on crashing saves above.
upgraded from previous patch, fatal CTD.
Had some CTD with patch K but none of them were fatal.
Was that a new game, started with m?
I do not think any of the things I have added in M should cause crashes. On the contrary, it contains just fixes from unoffical patch so should be more stable.
But what do I know...
Fixed, thanks and sorry
By the way people, how common are the crashes? Just wanted to know, there is not much more I can do with my knowledge. I suspect it is something carried over from FfH, but couldn't identify the exact cause nor fix it...
But trust me, I think of solving it. And if I could, even by removing/rewriting a civ or two (including my belowed mechanos

), I would.
I will release patch n later today. It will break saves (to include Korrina's fix I need a new promotion and that breaks saves). But I will update patch m to contain the rest of the fixes (sheut stone and python error). Both will be avaliable for download.
If anyone needs patch k for some reason, just say so and I will upload it too.