The instant that Ji Ning stepped through the towering gates and into the endless dark of the Castrum Divinitus, space began to twist around him. A moment later, the world brightened up as he found himself within a hallway.

This hallway had rather uneven walls that had torches stuck into them. The torches were blazing merrily, filling the hallway with their light.

“Eh?” Ning stood there in the hallway and scanned the area. No one else was in sight.

“What’s going on? Why have I been separated from Youji and the others?” Ning mused to himself.

Suddenly, a faint wave of energy rippled out from up ahead. Ning hurriedly turned to look, only to see strands of fire fly out from the two torches and coalesce in the air, transforming into the form of a barefoot, gauze-clad maiden. The maiden had long, beautiful green hair. Although her body was covered by a layer of thin gauze, she was essentially nude for all intents and purposes.

“I am the formation-spirit of the Castrum Divinitus. This is one of...