Zombie: I Refine the Corpse and Become Stronger in a Secret Space

Traveling through the zombie world, you encounter a female ghost asking for her life at the beginning. In desperate situations, the system is activated in time, and you can get rewards by doing good deeds. After that, he provided food to the people and accumulated merits. But he accidentally discovered that there was an evil cultivator at work, and the mastermind behind it was...