The Reaper's Advance

Located in the Bichu Mountains, the Reaper's palace was once a bloody abyss of great renown, filled with the Reaper's forces. It seemed the sky had begun a world-level slaughter, with the entire Earth surrounded by ghosts, and one could see the deathly sky with their own eyes. The former Bichu sky was so beautiful before King Suhua of Bichu, a benevolent ruler who would not cling to life even if his people were all slaughtered. For his country, King Suhua had his subordinates find the most powerful weapon smith, who forged a demonic blade in the sword foundry, a blade tentatively named the Reaper. With the sky invaded and the nation rendered worthless, the people rushed toward doomsday. Amidst the bloody storm, the demonic blade appeared. A turning point emerged, but this blade would eventually claim its master's life. — Description from novelcodex.org