Cao Zhen and his group spread the word that filling the 108 square cauldrons with the blood essence of strange beasts would cause the ancient treasure within the relic to emerge. They did this merely to wait for Xiang Ziyu to use his Mother Cauldron to devour those smaller square cauldrons, sparing them the trouble of gathering the blood essence themselves.
But now, what's happening?
They had just filled the two small square cauldrons in their possession with blood essence, and now, an astonishing phenomenon was manifesting in the heavens and earth.
Cao Zhen suddenly realized something: the lie they fabricated had actually been believed, and since there wasn't much else for others to do in the relic, they likely turned their attention to hunting strange beasts. Most likely, all the other square cauldrons had already been filled with the beasts' blood essence—only the two cauldrons in their group's possession remained empty.