The Underdark
in EmpiresThe Underdark is an enormous system of subterranean caves, caverns and tunnels located beneath the surface of Eternium. Like many natural formations of the Material Plane, the Underdark is known to have counterparts in the Feywild and Shadowfell respectively. In the Feywild there is the Feydark; in the Shadowfell there is the Shadowdark.