The Xuan Wu Jian sword (玄武剑) is a legendary sword in Chinese mythology and martial arts culture. It is also known as the Black Turtle Sword, as it is named after the Black Tortoise or Black Turtle, one of the Four Symbols of the Chinese constellations.
According to legend, the Xuan Wu Jian sword was forged from meteorites and imbued with the power of the Black Turtle. It is said to be incredibly sharp and strong, and able to cut through anything. It is also believed to have the power to repel evil spirits and protect its wielder.
The Xuan Wu Jian sword is often associated with the martial arts style of Wudang, which is said to have been founded by the Daoist priest Zhang Sanfeng. In some versions of the legend, Zhang Sanfeng is said to have received the Xuan Wu Jian sword from the gods as a reward for his devotion to the Dao.
Today, the Xuan Wu Jian sword is a popular symbol in Chinese martial arts culture and is often featured in movies, TV shows, and video games. It is also a prized possession for many martial artists and collectors.