All of these Young Kings did not slack off in any way during these three years. Their divine wills only grew to more unbreakable levels, gaining and determination that seemingly wanted to pierce through the very cosmos.
With their own hard work and painstaking effort, each of them had entered the Middle Stage Primal Sovereign perfectly. Their cultivation was quite fast, but there was no imperfection in their Inner World or their Dao Laws.
To achieve a perfect breakthrough was one part due to their talent, intelligence, and high luck.
Truthfully, the Young Kings were getting to a point where they could be compared to the senior Primal Sovereign masters of the Heavens. They were even stronger than some of the older Divine Decree Lords who had reached Primal Sovereign long before their generation.