I am not quite sure if I deduct the correct conclusions from Nurgle's cultist upgrade (got the German version, so maybe this is actually expressed more clearly on the English upgrade card). Nurgle can place a cultist for free in regions where he has no other followers present. Does this mean that he is still restricted by the general summoning rule and can only spawn them for free where he has followers in an adjacent region? Or does this allow him to teleport cultist to any region he likes regardless of the presence of followers in adjacent regions?
Hope someone can clarify.