In Xiao Tianyang's understanding, the Outer Domain was equivalent to the universe.
Meanwhile, places like Douluo Continent were akin to planets.
Phenomena such as Black Holes, galaxies, and comets were considered supernatural disasters here.
Because whenever they appeared, it meant the planets within a certain region would suffer.
They might be dragged away by gravitational pull, or worse, sucked directly inside and ground into fragments.
Of course, although the Outer Domain's environment was extraordinarily harsh, its resources were also immensely abundant.
Soul Power Crystals, which Soul Masters on Douluo Continent regarded as treasures, were merely low-grade minerals in the Outer Domain.
However, due to its nature, living creatures were also rare commodities within the Outer Domain.
Existences like Void Beasts were merely exceptions and were not especially common.
Furthermore, at some unknown point, the various planes began measuring their strength by the number of experts capable of stepping into the Outer Domain.
At their peak, Eternal Night, Purgatory, the Void, Terror Prison, and the like stood at the very top of the Outer Domain.
Back then, the number of experts they could send into the Outer Domain was counted in the tens of thousands. Usually, only large armies crossing planes would produce such numbers.
As for resources... they did not seem particularly interested in them.
Because most planes had subordinate relationships.
In essence, it was similar to the relationship between the Sea of Ten Thousand Evils and Gnar Fagern.
The resources collected below were submitted upward, while the upper levels sent back more advanced resources.
Such mutual supplementation formed the basis of a virtuous cycle.
As long as the planes under their command reached a certain scale, they could form a self-sustaining cycle.
Although the Outer Domain's resources were rare, no amount gathered could compare to a transcendent plane.
Therefore,