It must be said, Zheng Yi is quite satisfied with the performance of the Qi Family Patriarch he casually supported.
At least during his Qi Cultivation Stage, Zheng Yi could comfortably be the mastermind behind the scenes, remotely directing tasks he couldn't tackle directly, saving a lot of hassle.
The entire Qi Family was his white glove, incredibly useful, and very beneficial.
This is one of the reasons he didn't exterminate the Qi Family entirely in the beginning, leaving a branch for personal use.
Because the Power of the Soul is hard currency among Demon Cultivators, and the profit from Essence Stones is extraordinarily large.
In the Doomsday World, Zheng Yi crafted those Ghosts, which were essentially cost-free transactions, only expending some time and energy.
Thus, Qi Lin established a dedicated Artifact Refining Room for Zheng Yi to use.
