Within the mesosphere layer, Leon continued to refine Spatial Energy and Temporal Energy into Great pseudo-Grandmist Energy.
Compared to cultivating on the surface, Leon's Spatial Energy and Temporal Energy's gathering speed in the sky was many folds greater.
In fact, the difference was so significant; it was like the difference between heaven and earth, literally.
Even so, no matter how much greater Leon's gathering speed was within the mesosphere layer, there was still a limit.
This limit is set by the rate Leon expended his Mental Energy to gather Spatial Energy and Temporal Energy with Divine Will.
After all, Temporal Energy and Spatial Energy were types of energies from Great Laws that did not exist in tangible forms.
They cannot be gathered through breathing techniques like the Primary Laws.
Leon also realized this problem.