Legendary underground kingdom of a bygone age, with borders supposedly matching that of present-day Kroz. Ruins can be found in the wilderness of Kroz, attributed to this ancient culture of a kingdom supposedly ruled by Skreeks. Some adventurers and treasure-hunters are drawn to Kroz in hopes of finding one of these entrances, and fighting off monsters and traps in order to retrieve ancient treasures, but the known entrances have pretty much been picked over by now.