Neither of the two said anything as they walked toward the palace. Tang Wulin remained calm and collected, but he could sense that there were at least two Hyper Douluos accompanying Xue Yuntian, and both of them were constantly appraising him. However, what was rather disappointing to him was that there wasn't even a single Limit Douluo among their ranks. Even those two Hyper Douluos were only around the same power level as Li Yun, and their spiritual powers definitely hadn't reached the Spirit Domain realm, which meant that there would be no hope for them to become Limit Douluos.

Generally speaking, one's spiritual power would reach its peak at around 40 years of age. After that, spiritual power would naturally cease to develop, then gradually regress with age.

Hence, if one wanted to reach the Spirit Domain realm, the best time to do so was before...