This commander was originally an orphan. By a twist of fate, he entered the palace and became a eunuch. Due to his unique constitution, he was naturally able to cultivate. The former emperor saw him as promising and kept him close to nurture him, effectively cultivating one of his own.
Throughout the history of the Tang dynasty, every emperor practiced cultivation, yet they all suffered short lives.
Many of those who reached the late stage of the Golden Core cultivation fell due to their cultivation practices.
Only by reaching the Nascent Soul stage could one attain some longevity, though not for long.
For instance, some at the Nascent Soul stage could live for a thousand years, but Tang emperors only had lifespans of two or three hundred years.
The reason for this remained unknown.
To consolidate imperial power, each Tang emperor cultivated a group of trusted and powerful mysterious cultivators.
Thus, the Zhanxian Guard came into being.