In the grass a short distance from the huge, jet-black building that looks like the mansion of some RPG demon lord, I lay in wait under one of the bushes spread on the grassland around the Mansion.
Why am I here? Because while the building over there is part of the Territory of Damavand-Mansion, the full size of said Territory is 5 km. Not that we can make use of the air space that makes up the 2nd and 3rd upper floors, which also acts as a height limit for the mansion, but the underground floors are a different story!
The real Dungeon starts on floor 3, and there's even a special entrance for it hidden in the grassland here. The first two underground floors are withheld and used as a cellar/prison for the mansion, and the ox demon is located in the deepest cell down there.