| The Urgoth cannot get up the ladder in the lake tower. It's a bug. You have only two options;
1. Start over with any other character.
Or
2. Go back to the intersection, west of Fargrove, and head north bearing left through narrow passage to Talendor. Might as well swim the huge lake to the north side of the large island where the source of moonstones is. After you have one of those, swim to the southwest side of the lake, then south into Arindale.
The Elvin fortress was merely a shortcut and a couple of side quests. |