The universe was vast and endless. Humans on Earth had always been researching the universe in the past, but they had yet to have a clear understanding of the solar system, let alone the universe.

With scientific and technological means, even if thousands of years went by, Earth’s humans still could not understand the universe clearly.

In the vast universe, there were seven Greater Realms.

One of the seven Greater Realms was destroyed by humans during the Primeval Age. Now, only six realms w