Jia Yan's strength gradually increased while in seclusion, not because he practiced something new, but as a benefit that every biological powerhouse experiences post-promotion. After all, any biological entity that has just been promoted will be in the weakest period right after the promotion. Once this weak period has passed, they will restore their true strength.
So this process is not really an enhancement, but merely a recovery of the Nebula Level strength.
Thus, Jia Yan did not need to focus on his power enhancement and instead contemplated certain issues.
After three to five days, his strength rapidly escalated to the pinnacle that comes right after promotion, faster than other Galaxy Level powerhouses.
