Yusuf Zuck once again dived underneath the ruins of the ancient dynasty because Lily Case mentioned there was a Pill of Creation there, which, without doubt, would also be very useful to him.
You see, as the Blood Beads kept activating, his cultivation realm also needed to advance; otherwise, it might cause him to explode. Now, with the Nine Infants within his body, ordinary elixirs and rare treasures were no longer enough to support his promotion.
He aspired to achieve Feather Transform, as difficult as scaling the heavens, but with that Pill of Creation, not only might he achieve Feather Transform, he might even manage Divinity Transformation, or perhaps even reach the realms of Return to Void or Fusion!
It is known that, after Lily Case had consumed one, even crossing three calamities was due to the medicine's power, so he absolutely had to obtain that other Pill of Creation.
