A lot happened in the course of one night. The new passage that Zheng Yichen created brought about constant competition among those with ambition, leading to a great number of Supreme Demon relics being unearthed. Furthermore, people discovered that those Supreme Demon sites were not everything left behind by the deceased Supreme Demon.
As long as one could find them, they could monopolize them. The belief that only the Daughter of Heaven's Mandate could unlock the Supreme Demon treasure could now be disregarded. They were so formidable that even if the Daughter of Heaven's Mandate opened the treasure, she would have to take a portion away, whereas if they found it, they could deal with it themselves.
What need then, was there for the Daughter of Heaven's Mandate?