Zombie Keeper: I Can Synthesize and Upgrade Zombies

[Corpse Raising] [Another World] [No Heroine] [Not the Holy Mother] [Not Brainless] Traveling to the Netherland Continent where cultivation relies on corpses, good news: Bai Buge can refine corpses very quickly and the success rate has reached an incredible 100%. Bad news: only the lowest level of Baijiao can be refined. Fortunately, although the system arrived late, it gave Bai Buge the ability to upgrade the corpse by synthesizing it. So a strange corpse breeder appeared in Netherland Continent who only refined white zombies...