Season 5, Episode 31, Underground Blood Battle

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The rockery in the northern area of the Red Blood Cave Mansion covered an extensive area, and the underground secret chamber group beneath it was even more intricate, one after another, like a labyrinth. The overall layout extended at least a kilometer in both length and width.

Qin Yu leaned against a corner.

"Black Jade Box, one of the Nine Swords? Eighth Prince, Di Tong?" Qin Yu, having overheard the conversation between Cha Hong inside, had a rough understanding of the situation.

It was clear that the Black Jade Box was difficult to open. Cha Hong had spent a hundred years just to unlock it, and inside the Black Jade Box was one of the Nine Swords. Now, the Eighth Prince of the Nine Evil Hall was here to snatch one of those 'Nine Swords'.