Raising a Divine Coffin in a Zombie World

Su Li accidentally transmigrates into a zombie world and obtains the Divine Coffin System. Bury any evil spirit, ghost, or zombie, and it can be put to work for him and evolve into something stronger! He can even receive special rewards! Transforming a zombie triggers a special bonus, awakening the power of the netherworld and granting him a Netherworld Zombie! Years later, a zombie who calls himself the Lord of the Netherworld punches straight through the Eighteen Levels of Hell! Transforming a ghost hanged at midnight triggers a special bonus, awakening the divine soul of Fengdu and granting him the Ghost King of Fengdu! Years later, the Great Emperor of Fengdu undergoes a drastic change in temperament and actually appoints the mortal Su Li as ruler of the Underworld! As the Divine Coffin System reaches ever higher levels, Every ghost or monster Su Li buries instantly becomes a being on par with a Ghost King like Hanba!