The primary reason is that the treasures contaminated by Yin Qi that he found in the Sky Blue Realm are indeed highly valuable in the Canghai Realm.
This has allowed He Song to rapidly improve his cultivation.
However, those treasures contaminated by Yin Qi in the Sky Blue Realm are not endless.
Sooner or later, they will be exhausted.
Therefore, while constantly enhancing his own cultivation, He Song also feels a sense of urgency.
He needs to enhance his own strength and the power of his puppets to a certain level before these resources are fully depleted in the Sky Blue Realm.
This way, even if He Song can no longer use these resources to rapidly improve his cultivation in the future,
He Song can still rely on his own strength and his puppets to ensure his cultivation speed does not slow down too much.
With the support of numerous puppets under his command, He Song's overall strength might also improve more swiftly.
Moreover, it is also because of these heavenly materials.
