North district, Black Rock City.
Black Rock City was often referred to as a border city as it was one of the few cities charged with defending the borders of the kingdoms from both monsters and alien invaders. As a result, the city was developed more like a fortress than a regular city. However, with the unearthing of ores in Kiro mountains as well as another mountain range, alongside the discovery of abundant low-level resources in Stone Creek Forest and Letion Plains, Black Rock city began styling itself as a merchant stop, becoming more open and resourceful while boasting of impressive economic strength. Nonetheless, it still didn't forget its roots as a defence city.