Blind Sword Buried Heaven

He was born blind, carrying a pitch-black coffin on his back, trudging alone through the snow and wind of the Nine Provinces. The world spat on him for being unlucky, laughed at him for being useless, stole his last bite of food, and beat his only protector, his master, to death right in front of him. That day, he grasped the rusty sword his master left behind, stumbled blind into the bandits' den, and used thirteen corpses to christen his first blade. From then on, the blind man who always smiled became the Grim Reaper— Entering the Sword Sect, others cultivated the sword, but he 'listened' to the sword; his fellow disciples mocked him as a blind fool, yet he defeated all the sect's prodigies with a single strike. When the Blood Fiend Sect slaughtered his master's sect, he, at the Sword Aura realm, crossed three realms to slay the sect master. When a celestial powerhouse descended and forcibly opened the coffin, they found no bones inside—only a divine sword capable of severing karma, the Burial Heaven Sword. The ancient mystery was revealed: his blindness was not a natural defect, but a seal to suppress the coffin's power. That year, the coffin opened, his eyes saw, and the sword awakened. The former coffin-carrying youth split open the Southern Heavenly Gate with one slash. All knelt in prostration, trembling as they uttered that name— 'Sword Burier, Wentian.' — Description from novelcodex.org