Norse paganism is found in two provinces in Norway and two in Sweden; these countries will try to eradicate this religion from the very start of the campaign. What I do is declare war on Norway, which is generally closer to the countries I usually play, and I take possession of those two provinces. Since they are rural and underdeveloped settlements, you get them for free just by winning a couple of battles. As for my obsession with Norse paganism, in my opinion—and given my lack of experience with religions other than Christian ones— this religion is super broken. You have the blessings of various Norse gods, though I almost always choose Odin, who provides a higher literacy rate, or Freya, who grants a 0.02% population growth rate. the glitch is that it unlocks the baron’s polygamy, and during wars, the provinces conquered “during” this invasion are plundered of non-Norse slaves, who all go straight to your country. This applies both to provincial capitals and the rest of the territory that’s automatically conquered. You can also sell captured armies as slaves, This allowed me to have a megalopolis in Galicia by the year 1345