Practitioners of cultivation all aspire to become strong, and what do they rely on for strength? That would be resources.
And the most common resource is the Spirit Stone, a universally accepted currency that everyone can earn, and it is effective for everyone.
However, up to now, Yusuf Zuck had yet to see a medium-quality Spirit Stone. It seems that in the Heavenly Realm, only lower-grade Spirit Stones are in circulation, while the medium, high, and even superior grades are simply not available.
Although Yusuf Zuck currently owns some Spirit Stones, they are but a drop in the ocean for the endless abyss that is his cultivation, so he needs to earn more Spirit Stones to continue his practice.
