Introduction: According to legend, there is a strange book in hell, called the Book of Hundred Ghosts, but what is recorded in this book is not the ghosts registered in hell, but the ghosts left in the world. The book calls these ghosts in the world - He. It is recorded in the book that He can exist in the human world without being hunted by ghosts, but not any ghost can become He. The origin of He comes from a dark and resentful place, where thousands of corpses of wronged souls must gather here and be watered by the resentful corpses of thousands of undead souls. Hebian is the most peculiar species that grows in these places. They may be flowers, plants, trees, or snakes, insects, rats, and ants. They will eventually transform into human form and resolve the grievances of millions of wronged souls. It is rumored that 'He' is a strange existence in this world...