That egg, the descendant of the Fire Phoenix, was sent out by Evil Dragon Zhu Jiuyin specifically to breach the Death Hole so that it would remain unaffected by the seal.
And she was the one who had always guarded that egg.
Zhu Jiuyin's plan even factored in the Golden Lion, the Demon Emperor of the Twelve Domains. They had a transaction, and one could say it was all an elaborate conspiracy.
Upon hearing this, Ling Yun experienced a sudden flash of profound enlightenment!
That egg was Chiba, wasn't it!
Zhu Jiuyin used Chiba, sending her off to the Demon Race. Only among the Demon Race in the Twelve Domains could Chiba thoroughly awaken her purest Phoenix Bloodline.
As long as she remained in the Death Hole, her growth would be restricted, preventing her from transforming into her massive true form.
Yet...
He miscalculated in one step. Helian Wenzhong, the Demon Emperor of that era, likely discovered the truth and was consequently killed, while Old Ancestor Fu brought Chiba away to the God Realm.
Because of this, the Golden Lion could never track her down. Eventually, Evil Dragon Zhu Jiuyin grew impatient and resorted to manipulation once more, causing the gases that induced irritability in fierce beasts to seep out from this very place.
The last time Chiba was affected and her true form emerged, Zhu Jiuyin knew his hope had returned. He ordered the Golden Lion to capture Chiba and drag her back to the Death Hole, believing he then had the means to break the seal.
Now this was rich!
The Golden Lion had originally been tearing his hair out over failing to catch Chiba, only for her to deliver herself right to his doorstep by following An Qing to the Century Bell's sealing ground—which was none