The Essence of a Sword - S1.E9

Yún Xiāo and Xíng Hài reveal that their letters from Lǐn Xuě Yā asked them to swindle Fěi of her crossguard. Wú Shēng affirms this with the letter he stole from Xuě Yā's teacher, Lián Qí. Cán Yún is shaken up by this turn of events, but still follows the other three as they leave Bù Huàn and Fěi in their cells. Wú Shēng returns to the Tower, though, seeking Xuě Yā's head as promised. Meanwhile, Xuě Yā and Miè Tiān Hái are having a discussion about the Tiān Xíng Jiàn. Wú Shēng interrupts this discussion, though, and before going after Xuě Yā, challenges Tiān Hái to a duel. Tiān Hái slays Wú Shēng, and explains his swordsmanship to Xuě Yā. While this happens, Bù Huàn breaks out of his cell.