Yun Ran did not know much about the Demon World in the clouds. The Spiritual Divine Monkey only said that the Demon Lord was the Demon King of the Demon Realm.
"Then, after every Demon Lord died, they would not completely disappear because their souls were too powerful. There was a race in the Five Nations. Because they had made a mistake, they were chased out of the clouds and came to the Five Nations. They had always wanted to return, but they suffered from the barrier, so they thought of a way."
"That method is to use some special sacrificial ritual to summon the Demon Lord's soul and revive him."
From the looks of it, it was very likely that Mo Beiyuan's biological mother was from that mysterious race. Mo Beiyuan's birth might not be an accident, but his biological mother had participated in that special sacrificial ritual.
That was why the Demon Lord's soul had really reincarnated into her womb.
