While the Valraven is part of the Gnome kingdom and family, it works a little differently.
The Valraven has a form of counter on it (which Treasure Gnomes do not). It caps the minimum & maximum valravens each player will see at any point in the game. The most anyone will get ahead or behind is by a single valraven encounter.
This means all players should encounter the Valraven within plus/minus one of everyone else.