The mainland of the Zivania Dynasty is two levels below the ground, calling it the Subterranean City. A home for tens of thousands of different races gathered across the whole country. Together, they stand to fight their beloved kingdom and would block off everyone who wants to tarnish the place they worked so hard to build.
Originally, the city was created before the great betrayal in the dwarf clan. Dwarves did their best to help create an underground city for Zivania's ruler. It is one of man's biggest desires, to build an underground city where thousands of different people live, and peacefully enjoy their everyday lives.
In the middle of the city, hanging above everything else in the middle was giant bulb-like magic equipment. It is where the city is getting the light it needs to have in the morning, and when it is night, the equipment will amazingly turn into a moon-like bulb, which gives dim light to the Subterranean City.