Continuing to upgrade spiritual energy through the traditional Heavenly Dao cycle is merely like eating, excreting, and eating again, trapping oneself in a closed loop without the slightest gain.
If he wanted to acquire more resources and progress faster, he had to venture toward higher-level worlds, or perhaps consume a few more small worlds.
However, the cosmic void was vast and boundless, and small worlds brimming with vitality were found more by chance than design. Only entities like the Spirit Realm possessed coordinates to numerous other worlds. Therefore, traveling to the Spirit Realm was the natural next step.
Chapter 381