If you like fantasy there is Godherja another mod in a self made fantasy setting for CK3 https://steamcommunity.com/sharedfiles/filedetails/?id=2326030123&searchtext=godherja
Mod is still in active development so there is more to come.
I dont think so but there is a magic system and a fog that slowly devours the whole world. I havent played much with the mod.
