Martial Killer Immortal Lord

This is a world where immortals and martial arts coexist. Immortality is declining, but martial arts is strong. Immortal cultivators are reduced to human elixirs, living in the shadow of warriors. Warriors are above all living beings and regard mortal lives as nothing. When Li Xuan first came to this world, he was killed. In a desperate situation, a mysterious system awakens. Since then, there has been one more immortal cultivator in the world who has walked through mountains of corpses and seas of blood. "Whether it's a warrior or an immortal, a demon or a god or a Buddha." "Anyone who stands in my way will be killed!"