Fourth-Grade Alchemist And Formation Master

Of course, there was a more convenient way to improve Ye Xuan's physical body, which was through the system.

As long as Ye Xuan helped his disciples strengthen their bodies, his would also be strengthened in turn. 

However, it was not easy to do so, as he would need to strengthen their special constitutions, which required rare heavenly treasures. Furthermore, these heavenly treasures were specific to their corresponding special constitutions.

Ye Xuan himself had never seen anything that could strengthen the Demon Devouring Body.

At present, Ye Xuan only possessed heavenly treasures that could strengthen sword and fire special constitutions. In other words, he could only improve Yue's sword jade body.

Since Li Qingyan possessed the dual-spirit body, he had to find a corresponding heavenly treasure for the wood element part of her dual-spirit body.

Alternatively, he could temper his disciples' bodies with lightning bolts.