Half a month later.
Beneath the wooden cabin.
Chen Mu stood at the end of the tunnel. Before him was a pitch-black fissure half the height of a man.
Waves of cool air rushed toward him, accompanied by the faint sound of flowing water.
Chen Mu was surprised. "Could this crack connect to an Underground Yin River?"
Delight rose in Chen Mu's heart. "If I can find a route by following the Yin River, I won't have to go through the trouble of digging tunnels."
Though he had the idea, he did not hurry down.
Earth Spirit Vital Qi nourished all manner of strange Mutant Beasts and demons. What if some bizarre ferocious beast was lurking below?
Chen Mu immediately dug out a large chunk of rock from beside him and blocked the opening.
"Since I've already dug this far, there's no rush. I'll use the Five Ghosts Yin Soul to scout ahead slowly."
Five more days passed. Chen Mu gradually widened the fissure and dug downward bit by bit, finally reaching a pitch-black space.
The sound of rushing water grew louder.
Chen Mu activated Hundred Mile Qi Seal, and a Fluorescent Algae Lamp the size of a human head slowly floated up.
Its pale white glow illuminated this underground cavern, which had existed for who knew how many years.
The cavern was long and narrow, running roughly north to south. It was about the size of two basketball courts, with a ceiling two or three stories high.
Strange stalactites were scattered everywhere. Below ran a stream over two meters wide, barely more than a creek.
The water emerged from a crack in the rock at the northern end, then disappeared into a man-high fissure beneath the southern side.
"If I widen the rock fissure along the watercourse, I'll