An immortal sword formerly belonging to the Celestial of Heavenly Sorrow. It has the ability to control sorrowful emotions, forcing victims to recall their most painful memories. It can open the Grotto-mansion of Heavenly Sorrow. After being discovered by Chi Miao, it was slammed against walls repeatedly and eventually had to kneel and beg to form a contract with her. It addresses Chi Miao as Master and is described as having a flatteringly subservient personality.
