Originally, the bloody battle between demons and devils was not limited to the bottomless abyss.
Including the Scorching Hell, the Windy Abyss, the Asura Arena, and other lower planes, there were Blood Battlefields.
However, under the will of the Lord of Nine Hells, the Hell Devils, who had a strict hierarchy, had changed their strategy of bloody battles. They gathered the bloody armies of other lower planes and took advantage of the time when the Abyssal Demons were busy fighting to become kings and had no time to take care of the demons 'emptiness to flood into the Myriad Abyss Plain.
The Eight Infernal Demon Generals had all descended into the Bottomless Abyss.
The Bardi Archdukes and a few other Archdevils also built fortresses in the Myriad Abyss Plains, continuously guiding the hellish aura into the Myriad Abyss Plains and transforming it.
In the current first layer of the Abyss, demons ran amok.
