As Zhou Tong continued deriving the method, he looked at his Ten Cave Heaven Divine Rings, and a thought surfaced in his mind.
The most important aspect of managing a world was circulation. Most importantly, there had to be birth, aging, sickness, and death, allowing the world to enter a cycle and gradually grow within that cycle.
But if a world had too many immortals, then those people would feed on the world forever. Sooner or later, they would become the world's "cancer."
Cultivators plundered the creations of heaven and earth. If they were immortal, they would eventually "steal" the entire world dry.
Yet for a world to grow, what it needed was not immortal experts, but dead experts. Only after dead experts and everything they possessed were reabsorbed by the world could they in turn promote the world's growth. Immortal experts brought little benefit to the world.
Zhou Tong knew very well that even a vast universe like the Desolate Era World had fallen into a great crisis because of ageless cultivators. The experts of that universe had been harvested by people from other universes, leaving the entire universe facing the danger of being refined.
But if the threshold for immortality were raised a little and cultivators' lifespans reduced somewhat, then even if the same thing happened, the crisis facing the entire universe would be greatly diminished.
"Controlling the lifespans of experts is a necessary measure. Only by controlling their lifespans can cultivators truly unleash their potential and walk different paths. Those paths can serve as references for me as well." Zhou Tong thought of the Nine Heavens and Ten Lands.
There, because Zhou Tong controlled the Longevity Substance, ordinary Great Emperors had lifespans of no more than thirty thousand years. Yet precisely because of this, the average level