[Twan]

Mod commands are not far to be able to make this kind of nation (you can use dying dominion like Mictlan, but without allowing blood sacrifices, sloth immune nations too, but there aren't commands to make a nation immune to other dominions effects, you can also give this nation lots of iconoclast reducing the dominions ; the only problem is : without an awake pretender the atheist nation will lose in the beginning of turn 2).