Protecting the World: It Started When Zombies Knocked on My Door

Also called the Nightmare Era: It started when the monster knocked on my door A key, a door, and a group of heroes build the Great Wall. With a burst of sadness and tears, I took up the pen to write about the suffering of all living beings. Have you ever thought about it, there is actually another unknown side of the world we live in. In that world, there is a completely different ecology from the real world. The Grass of Despair releases the black mist that leads people to commit suicide, the Wailing Flower that emits a mournful cry to imprison the soul, the Tree of Pain that keeps dripping blood to reveal the face of pain, Various evil beasts composed of evil energy and the emotions of people in the positive world, as well as evil fallen bodies formed from part of the soul fragments of people who have experienced extreme pain... The black mist that induces depravity, the monsters hiding in the black mist, the "lighthouse" that purifies the world, and the guardian envoy guarding the "door". Modified memories and blurred perceptions, what are they hiding? The coming catastrophe, the impossible path to divine attainment, what are you longing for? The early stage is relatively slow, and it is on track around 30 chapters. Book lovers who can't wait can skip it. It won't have much impact in the early stage, but some foreshadowing may be missed in the later stage. Of course, if the author doesn't write it to the later stage or above, I'll pretend I didn't say it (◦˙▽˙◦) Semi-system, not only the protagonist has it. The protagonist can help people but is not brainless. He is not brainless because the author still has some brains. I also hope that readers can be more patient and don't scream when you see something. If you don't like it, don't enter it. Of course, if you criticize the author, you are too blind to see it.