The Immortal Sword is a piece of fire jade that was transformed into Pangu's left hand after his death. The ancestral shaman Zhurong smelted it with the true fire of his life. Ten thousand years later, he tempered the sword with his own blood to take its shape.
When the sword was completed, day and night reversed, ghosts cried and gods howled, and the violent aura on the sword soared into the sky. It was struck by thunder from the sky, but the sword was unharmed. Because the poke fairy gathers the souls of lich, fairy and demon, when the sword comes out, there will be evil ghosts and evil spirits appearing on it, adding to the divine power. The evil energy in the sky attracts the Buddha and wants to destroy it, but it is unable to smash the body, so he has to use the blood of the Buddha to transform the evil energy to reduce the killing blow.