Guardians of humanity, exposed during the censuses

From ancient times, before humans were born. He had been guarding the altar all this while. He was alone and had to bear everything. Behind the altar was another world, the Abyss Spirit World. It was filled with countless spirit monsters. They were bloodthirsty, violent, and lifeless. They wanted to break through the space-time rift on the altar at all times. Stepping into this world and slaughtering all the living beings in this world. Kill, transform into the spirit army! However, it was made public with the population survey. The truth was exposed…