Doomsday Invasion, Implant the Strongest Heart at the Beginning

Weird pits appear one after another all over the world. On the instrument specially used to detect supernatural phenomena in the Bureau of Divine Investigation, the pointer suddenly jumped and kept jumping. A shocking catastrophe is about to come, or has already come, Hundreds of beasts and ghosts crawl out of the pit and kill humans. Humanity seems to be helpless and facing extinction. Professor Ye investigated many years ago and concluded that there is actually an underground world and a picture of strange beasts written by an unknown person...