There were many mystic realms in the Earth Domain. Some of them were naturally endowed with thick concentrations of heaven-and-earth spirit energy. The Ink Feather Mystic Realm—the number-one mystic realm in the Earth Domain—was one such example. The Ink Feather Mystic Realm was very secluded and secretive; not more than ten people in the entire Earth Domain knew where it was.
Another mystic realm was also very secretive; even fewer people knew about it. This mystic realm was called the Divine Yang Mystic Realm; it was the secret base of the Divine Yang Race. When the Divine Yang Race had been attacked by the joint forces of hundreds of great family clans many years ago—if it wasn't for this Divine Yang Mystic Realm, the Divine Yang Race would have been totally annihilated.