I've Been Invincible Since Sword Demon

Death is like the wind, always with me! A genius swordsman suddenly became a top swordsman after being tricked by his father for more than ten years. All the classmates, instructors, and villagers who originally laughed at him were shocked. He demonstrated swordsmanship that amazed everyone, and he had almost abnormal physical fitness and defense. His swordsmanship is so proficient that it can be included in textbooks. He has obtained the power of the first-generation Sword Demon, and he is invincible! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.