The second layer of spatial boundaries consisted of spatial rules that even primordial origin golden immortals could touch and apply.
These spatial rules possessed the attribute of immortality.
Only cultivators at the primordial origin golden immortal level or above, who likewise possessed immortality, could contend with them.
And put them to use!
But nothing was absolute. Not every system of rules was absolute, either.
Just as flames could continue burning underwater.
The interdependence of time and space had thus led to the birth of the third layer of the world.
The domain of time and space.
This was a junction where some of the power of time and the power of space implicitly overlapped.
Perhaps it already contained the rudimentary concept of the diffusion of spatial power.
And this was something only cultivators in the hunyuan taiji daluo golden immortal realm with a solid understanding of the Way of Time and Space could comprehend!
Put simply.
One had to be a cultivator of the Way of Time and Space in the hunyuan taiji daluo golden immortal realm.
One could cultivate either the Way of Time or the Way of Space.
But one had to comprehend at least one rule to the point of mastering it.
As for primordial origin golden immortals capable of mastering rules.
They were either top primordial origin golden immortals in the first tier, waiting for a Sage position to become vacant so they could ascend directly.
Or they were simply hunyuan taiji daluo golden immortals already.
What lay within this were the Way of Worlds and the Way of the Virtual.
And Xu Tong, quite coincidentally, had mastered the Way of Space to a level that nearly qualified him to ascend to the hunyuan taiji daluo golden immortal realm!
Taishang Laojun was growing somewhat flustered and