For a hundred years since Opening Heaven, Mu Tung had not sacralized nor elevated his own world.
He was taming a Spirit Beast. Spirit Beasts can advance along with their masters, especially alongside the master's world.
A Ninth Grade Spirit Beast can open the Profound Realm. Before reaching the Ninth Grade, if a Spirit Beast could participate in a cultivator's personal world advancement, it greatly aids in ascending to the Ninth Grade and creating the Profound Realm.
If a Spirit Beast participates in refining the Cave World, the Cave World can also acquire a share of the Spirit Beast's elusive and substantial Tao Rhythm, increasing its essence and strength.
Just wasting a mere hundred years, then elevating the Cave World after subduing a Spirit Beast, is definitely worth it.
