Lake Emerald is a large lake south of Horizon. It has an azure coloring and used to be very misty. However, after the invasion of Zanna Wrass, dark thunderclouds have replaced the mist. The lake contains several portals to the Underdark. These can be entered through whirlpools. The Emerald River flows from the lake to the north coast.
Hidden in the mists a village can be found. The leader of the eladrin tribe that used to live there, Velindar Cloudshade, is now a vampire under the command of Zanna. Other eladrin have been killed or zombified. The eladrin that joined the Given Land Army escaped and are as of yet unaware what happened here.