What game-play technical stuff should I keep in mind when GMing a campaign in which my PCs are treading across these northern realms? Also, I found the World of Aventuria to have little, and quite useless info about this place, the city of Riva and it's vicinity. I thought it would be wise to start the campaign in a place, that as Finnish people we can relate, at least with what comes to the climate. But as I looked there was only a little box containing trivial information. I'd like to know the following: local ruler + something about the social hierarchy, main languages, what region does it belong to. Should our heroes be middenrealmian, and garethian or what?There was no mention of the Nivese in the basic rules as far as I know. Well I know that there used to be Thorwalians there, but are they there anymore. To clarify, the info I need is about the things that affect character generation and gameplay.