Bone and Blood: The Edge of Vengeance

The entire Luoyue Sect was drenched in blood on the city walls, and young Xiao Lin witnessed his elder brother being shredded by the Bone Blood Blade of the Youming Sect. After ten years of hiding, he abandoned orthodox martial arts and cultivated the life-shortening forbidden technique, Bone Blood Edge. One slash burns blood and qi, one cut depletes lifespan; the enemy's head is the only destination. The court eunuchs colluded with the evil sect to alter the annihilation case files, making loyal ministers mere pawns. He crosses paths with Wen Nian, a mechanism master bearing the burden of avenging her father—one seeks to slaughter all enemies, the other wishes to use mechanisms to stabilize the chaotic world. Feeding the edge with bone and blood, using life as a blade; the jianghu sets off a killing game, while the court hides conspiracies. Will he slaughter his way through a sea of blood to die alone, or set aside personal vengeance and protect the common people with his broken body? — Description from novelcodex.org