Nine Tribulations Corpse King

Modern surgeon Lu Jiuyuan was retaliated to death by the patient's family due to a surgical error. His consciousness fell into the "Yellow Spring Fissure" filled with blood mist, and he was dragged into the corpse world by a voice claiming to be "Zombie Ancestor's Remnants". Here, zombies are divided into eight realms: purple zombies (the lowest), white zombies, black zombies, hairy zombies, flying zombies, wandering zombies, floating zombies, and non-transformed bones. High-level zombies control the rules of the corpse world, while low-level zombies are enslaved and devoured like ants.