The integration of Space Rules with some foundational rules was the prerequisite threshold for breaking through from the Eighth Layer to the Ninth Layer. At the Tenth Layer, it required the fusion of additional rules. Besides the Rule of Time, other pillar rules could also be attempted for fusion.
For instance, the rule of life and the rule of death, as pillar rules, could be fused into the Life and Death Samsara Rule, whose destructive power was astonishing, impervious to multiple Spatial Layers.
Of course, both the rule of life and the rule of death were pillar rules. The fusion between pillar rules was not a simple task.
Therefore, there was no specific standard for the strength of lives at the Tenth Layer, and everything was judged based on the level of threat.
The major cosmic tribes, according to a unified standard, divided the threat level of Tenth Layer strong ones into six tiers.
A, B, C, D, E, F.