I'm planning to play my first CK MP game with my friend and we both were planning to play as Russian princes. I was thinking Kiev and friend was thinking Novgorod, but there's one problem. What will happen when other player is your heir and you die? (Novgorodian prince is son of Kievan prince.) Which players princedom will vanish? Or can player even inherit other players realm? Should I change inheritance law as a first thing to do?