In the suburbs of Sky Capital, within the underground base of the forbidden area, in the Dispersing Spirit Space.
"...Is this satisfactory?"
The Dispersing Spirit Iron Throne, previously facing due north, now faced southwest. Ren Zuo sat on the throne, his right index finger flickering with dancing purple lightning. He pointed towards what used to be a wall and asked the nearby researcher in a calm tone.
"That'll do, that'll do." The middle-aged researcher looked at the scene before him, swallowed discreetly, and then asked, "Is this the Fourth-Stage Spell 'Alchemy Furnace Technique'?"
Under the purple electricity at Ren Zuo's fingertips, the steel plates and concrete that had formed the walls of the Dispersing Spirit Space rapidly dissolved and reformed. They became a series of pipelines extending into the distance, eventually connecting with the pipes already laid in the upper levels of the forbidden area.