Half a month later.
Underground, beneath the wooden cabin.
Chen Mu stood at the end of the tunnel, facing a dark crevice about half the height of a man.
Blasts of cool air hit his face, and he could faintly hear the sound of flowing water.
Chen Mu was surprised, "Could this gap be connected to an underground Yin River?"
Chen Mu's heart leapt with joy, "If I can find a route along the Yin River, I wouldn't need to go to the trouble of digging a tunnel."
Despite this idea, he did not hurry to crawl down.
The Earth Spirit Vital Energy nourished all sorts of Exotic Beasts and Monsters, and there could be some strange fierce beast lurking below.
Chen Mu promptly dug a large rock from the nearby stone and blocked the entrance to the crevice.
"Since I've dug this far, there's no rush. I'll use the Five Ghosts Yin Spirit to explore slowly ahead."
...
Five days later, Chen Mu slowly widened the crevice, digging bit by bit downwards, until he finally came to a pitch-dark space.
