Atúb Mol was used long ago by the Âkhi kuo-toans. They used this Underdark passage to raid their rivals at Gholompotl. The Glashnarz river flows south along the passage. There are many pools and wetlands along the route. When the Khazarkar Empire began expanding the Sûrag for commerce, they came under frequent attacks from the kuo-toans out of Unvarith. As a result, the Batthurâk blocked the route to Atúb Mol with walls and towers. The Underdark castle guarding this side passage is called Zenunâth. It is manned by soldiers out of Mulun-Dûna.