The World Opened up by Two Steamed Buns

(Traditional martial arts, no time travel! No system!) In the late Southern Song Dynasty, people in the world were looking for an invisible sword. They didn't know that the sword was in the hands of a blind girl. She accepted a young beggar as her apprentice and taught him three moves. The first move saved his life. The second move made him famous in the world. The third move! ! ! The little beggar knelt in front of her and said, "Master, who do you want me to kill with this sword?"