If there's anyone more familiar with this Dungeon Maze besides Xitacil, it would naturally be the castle's current nominal master, Tu Shenyi.
In fact, aside from some publicly revealed reconstructed stone chambers, there are many secret rooms here—for instance, the chamber Xitacil initially used to greet Luo Qiu.
Or, for example, the place Tu Shenyi is currently at.
This place is more like a laboratory... a laboratory hidden deep underground. There are numerous instruments here that vampires like Xitacil have acquired through their abilities, some even being of a national technological level.
The laboratory contains many large vitreous containers, each preserving countless bodies in a special liquid—almost all different specimens.
There are humans, giant werewolves, mermen with tails and beautiful features... even vampires. All these have been captured from all over the mainland for the True Blood project supply for Tu Shenyi's research.
