In five days, his cultivation soared close to the mid-period of Myth, an advancement speed so astonishing it could shake the entire Federation. This was the true "value" of a genius without equal throughout history.
Of course, Jack Clark was very clear about the reason for his rapid cultivation.
Moreover, this extreme closed-door cultivation was somewhat wasteful; burning fifteen thousand Attribute points a day for cultivation would have been enough for him to break through to the mid-period of Myth.
As the extreme closed-door cultivation progressed, Jack Clark's improvements became slower and slower, as his consciousness was no longer able to process, absorb, and convert those realizations in real-time.
In every moment of soul interaction with Heaven and Earth, Jack Clark would comprehend countless mysterious information about the six Laws such as strength, Death, the Void, and the soul.