In the blink of an eye, a quarter of an hour had passed. Within the ghostly mist, a faint gray shadow darted behind a withered tree.
This tree grew on the edge of a cliff, one side covered with rubble, the other a bottomless abyss. Spiritual sense could penetrate twenty or thirty miles into it without finding the bottom.
Could the Yin-attributed spiritual vein be beneath this subterranean abyss?
At this moment, a gray-haired old man and others stood near the edge of the cliff, a dozen miles to Zhang Ling's left.
"Old brother, could the spiritual vein be down there?"
"Indeed. I ventured in before, but before I could gather many spiritual objects, I encountered several powerful demon ghosts," the gray-haired old man said, staring into the bottomless abyss without turning his head.
During the period when this valley erupted with ghostly mist, the four of them had entered the valley to investigate.
At that time, the four of them acted separately. Only he discovered the Yin vein beneath this cliff. Subsequently, it attracted several demon ghosts.
Therefore, the four families temporarily sealed this valley. Back then, a high-level Yin ghost escaped, killing many people on the road, and was jointly exterminated by them.
"I wonder if there are any other dangers below."
"Hehe, don't worry. Those powerful demon ghosts from just now, two of them were encountered before. Even if there are more high-level demon ghosts below, there won't be too many. We won't be afraid if we join forces. Now we are pressed for time, we can scavenge this place before the few outsiders behind us break the formation."
"What the boss said is right, let's go down quickly."
The four of them discussed a few words at the edge of the cliff and then headed down into the subterranean abyss. Zhang Ling, who was hiding behind the big tree, had also disappeared.
...
In the darkness, the black shadow that Zhang Ling had transformed into was constantly falling downwards. At this time, he had already entered the subterranean abyss, one step ahead of the four great families.
He wanted to get inside and scavenge spiritual objects before them. As long as he was fast enough, the harvest would definitely be easier than following behind the four and picking up leftovers.
Of course, he also guessed that there might still be other high-level ghosts left in the subterranean abyss. But this risk was worth taking.
As he continued to descend, the surrounding environment was dark and gloomy, and even the ghostly mist thinned out a bit. Instead, the Yin wind blowing upwards from the bottom of the earth was icy cold.
In this environment where he couldn't see his fingers, he accelerated a bit. Before long, he was at least thousands of feet away from the ground, but he still hadn't reached the bottom.
Suddenly, a burst of splashing water caught Zhang Ling's attention. A sweep of his spiritual sense revealed some small holes in the adjacent stone wall, from which streams of underground water flowed, hanging on the cliff wall like waterfalls and falling downwards.
In the water flow, Zhang Ling suddenly saw something flickering with a faint green light. He raised his hand, and a stone emitting a green fluorescent light flew out of the waterfall.
Looking at the green fluorite in his hand, which was only the size of a thumb, it was somewhat similar to a wood-attributed spirit stone. However, the green fluorescence outside the stone occasionally emitted some gray gas.
Instantly, Zhang Ling recognized that this was a low-grade Yin spirit stone, which was quite rare in the cultivation world. It could only be formed in Yin-煞之地. Just this small piece of Yin spirit stone could be exchanged for more than ten low-grade spirit stones.
In the adjacent waterfall, Zhang Ling swept his spiritual sense and found that some flickering green fluorescence could be seen on the stone wall behind the waterfall. They were all emitted by this Yin spirit stone.
Zhang Ling flicked his sleeves and collected all the thirty or so Yin spirit stones nearby into his storage bag. Then, he didn't delay any longer and quickly fell downwards.
He had to get ahead of those people, so naturally he couldn't waste time on these low-grade Yin spirit stones.
Three thousand feet.
Five thousand feet.
...
As he descended deeper and deeper, Zhang Ling was quite astonished. He didn't expect the space below to be so deep that he still hadn't reached the bottom. Another dozen breaths of time passed, and he estimated that he was at least ten thousand feet away from the ground.
Finally, at a distance of about fifteen thousand feet from the ground, his feet finally stood on the ground.
Being so deep underground felt a little oppressive, but here he could see some fluorescent light, and he could roughly see the surrounding environment with his eyes.
The fluorescent light was mostly emitted by slender grasses under his feet. These grasses were generally gray-white and emitted a green spiritual light. This was fluorescent grass, a low-level spiritual grass of only the first grade. It could only grow in this dark environment.
Its value was not very high, so Zhang Ling did not move these fluorescent grasses, but explored towards the right.
When he was above, the direction of those four people was on his left, so exploring to the right now would basically avoid encountering these people.
The underground space was very large. Besides the dark rocks, the ground was also full of scattered stones. Some low-level Yin spirit stones were also found among some of the stones.
Strange popping sounds rang out from time to time, and gusts of Yin wind raged throughout the underground space.
Suddenly, Zhang Ling discovered a ball of gray-white whirlwind rotating constantly not far away, which was somewhat strange. He couldn't help but release his spiritual sense to take a look.
It was not an anomaly formed by a whirlwind, but countless gray-white moths gathered together, making strange, piercing chirps.
Each of these moths was only the size of a thumb, but they all emitted a weak Yin spiritual power. It was actually a kind of spirit worm.
Zhang Ling had a spirit talisman on his body, so these moths did not find him. After a few breaths of time, the whirlwind formed by these moths disappeared.
In the following period of time, he also encountered some demon beasts in the underground space.
There were both the blue-faced ghost heads that they had fought before, as well as several Yin-cold attribute demon beasts such as cave bats and Xuan Yin snakes.
Fortunately, the strength of these demon beasts was not strong, and the strongest one was only at the level of a third-tier demon beast.
As long as Zhang Ling did not deliberately use too much spiritual power, the effect of the spirit talisman on his body would not be broken, and these demon beasts would not be able to find his figure.
This reduced some trouble for him.
During this period of time, he also discovered five or six kinds of Yin-cold attribute spirit herbs of the first and second grades, such as Gathering Yin Grass and Xuanbing Flower.
The age of these spirit herbs growing here was not short, the lowest was about a hundred years, and the highest was a six-hundred-year-old second-grade spirit herb, Xuanbing Flower.
There were many of these spirit herbs. In a little over a quarter of an hour, Zhang Ling collected thirty or forty of these spirit herbs. Taking them outside could exchange for six or seven thousand low-grade spirit stones.
This could be considered a harvest, but Zhang Ling was not very satisfied. His purpose here was not these low-level spirit herbs. Thinking of this, he patted the spirit beast bag around his waist and released the corpse bear.
With a thought, he saw the corpse bear's eyes light up with blood, and its body shook slightly, drifting out wisps of gray-white corpse gas that spread around.
