Breeding the Human Race as blood nourishment has long been a tradition of the Demon Clan.
In the Ancient Era, when the Human Race was first born, their strength was meager. Yet, due to the protection bestowed by Empress Nuwa, no clan on the vast lands of the Prehistoric World dared to lay a hand on the Human Race.
However, as the Human Race developed and their numbers grew, aside from those in the Ancestral Land who still enjoyed Empress Nuwa's protection, those outside the Ancestral Land became the targets of many other races.
In the Ancient Era, even though the Human Race was not considered the paramount of all spirits, they carried the aura of the Heaven and Earth's spiritual rhyme. The people of the Ancient Human Race embodied the Innate Creative Essence within them.