Underground Research Hall.
This is a massive structure built specifically fir Feng Yuyan, just like Chu Xueyu's Palace and Leng Shuang's Pagoda.
As the name suggests, it is located underground, connected to the Underground Grand Prison.
This is here where she conducts her experiments, and since she specifically connected it to the prison, she can have as many test subjects as she likes.
At this moment, a heavy, iron-bound door groaned on its ancient hinges as Shen Haoran stepped into the lightless realm that is the Underground Research Hall.
The air here was different from the outside world or the prison. For one, it didn't smell of damp moss or decay, but of sterile, biting chemicals, preserved death, and the metallic scent of high-level formations.
Haoran walked down a dark, spiral staircase where the only light came from flickering spirit-lamps embedded in the walls.
At the bottom, he found a massive chamber that looked like the workshop of a mad god.
