[andrewas]

Wylfdene is the (kinda) final boss of the HoW Expansion, not the game. You continue with the stnadard quest after defeating him, which likley means heading off to lower dorns, although its possible to trigger the HOW expansion before Wyrms Tooth.

Also note that you should download and play the ToL expansion *before* finishing HoW as it cant be triggered outside Lonelywood.