Under Heaven: Sword Through the Demonic Realm

On his wedding day, Wen Shubai, still in his red robes with the wedding characters not yet dry, saw his village stained with blood as all his fellow villagers perished overnight, turning past warmth into ashes. With one arm, he carried his sword into Blackstone City, begging the city lord to send troops to eliminate the demons, but was thrown out as a madman. The city was filled with songs and dances, masking peace, with no one caring about the bones of a village dozens of miles away. As chaos loomed and demonic objects descended, the city lord secretly gathered three hundred young girls to refine a forbidden yin-sha formation, trading the lives of the entire city for his own immense power. In a perilous world with dark humanity, the path lies ahead, and one must walk it alone! I have a sword named Zhan Tian, capable of splitting mountains, severing rivers, and cutting down the Heavenly Dao! From then on, the world gained a one-armed youth carrying a sword... — Description from novelcodex.org