Just because Zhao Xuanxian is so... so young, so young that one can't help but think of his master: the Primordial Venerable!
Back in the day, the Primordial Venerable was not yet three thousand years old when he opened up the Five Elements Cave Heaven, which shocked the entire Taiyi Spirit Realm.
Although Zhao Xuanxian is not as exceptionally talented as his master, he is not much inferior.
This person is now just over eight thousand and seven hundred years old. At the same age, other Half-Immortals of the Void breaking through to the Returning to Void Third Level would be the limit, but he has already successfully advanced to the Unification Realm.
Since the Spirit Realm has historical records, the number of Integration Realm Great Powers has exceeded a million.
If ranked by age, Zhao Xuanxian would be in the top hundred!
It should be known that nearly twenty percent of those ranked ahead of him have already ascended to the Immortal Heaven.
