I Am Alone in My Soul

F-level useless soul hunter Chen Mo was betrayed by his teammates. When he was about to die, he awakened the undead master system. He used dead bones as food and dead souls as blades, and transformed into a forbidden necromancer. Fighting alone in a secret realm, being crushed by legions, looking for a girl in a wanted heretic, and finally becoming a life-and-death mastermind.