Invincible Under Heaven: Reborn as the Enemy

In a world where the human race and demon race have been locked in conflict for hundreds of years, Lin Potian stands as the mightiest warrior of the demon clan. After returning home victorious from battle, he is poisoned by a pregnant human woman and witnesses the massacre of his entire family. As he dies, Lin Potian swears a blood oath: if there is an afterlife, he will hunt down this human woman and slaughter her entire family for revenge. He then perishes filled with hatred and resentment.