The Sad Sword shouldn't be called a sword, it should just be called the Broken Sword. The sword is like a human being. Due to excessive sadness, the heart of the sword is broken, leaving only half of the sword body. The Sad Sword is a sword that can only be danced by those who are sad. It is not like other swords that either make people bleed profusely, or seal the throat without bleeding. It only pierces the opponent's body with light, and only sheds a few sad tears in the surge of sword energy, making the opponent recall the love and hate in his life and cry sadly until the tears dry up and die. Not everyone can own the Sad Sword, only the truly sad people can own it. According to legend, the master who forged the Heartbreak Sword was driven by love and hatred. He was lonely all his life. He lamented the impermanence of the world and planted a poisonous oath on the sword: Anyone who does not have the Heartbreak Sword will die of a heartbreak. This sword has lasted for thousands of years, and its owners were all lonely and sad people. Thousands of years ago, Nangong Xuan, the head of the Nangong family, did not believe in the poisonous oath and took the sword as his own. In the end, he killed his wife and abandoned his son. He did not die well, and the sad sword also disappeared.