Killed with One Stroke

As an infant, Xu Yi was entrusted by his parents to live with his master due to his family's misfortunes. Under the protection of his master, he spent a stable childhood and adolescence, not only learning advanced martial arts, but also developing a persevering character. However, when Xu Yi was twenty years old, the master suddenly left a letter and left quietly. In the letter, the master did not mention a word about his whereabouts, but simply explained some funeral arrangements and left a knife that could not be unsheathed to Xu Yi. This knife was the only thought left by his parents to Xu Yi. Nearly thirty years old, he always has a question in his mind: Where has the master gone? Why did you leave suddenly? In order to find the answer, Xu Yi decided to go out to find a teacher. He set foot on this vast continent alone, and with the sword that could not be unsheathed, he began his journey to find a master, and thus entered this period of rivers and lakes disputes...