Wang Daoyuan answered, "It's hard to say. I don't know what's going on inside the Ghost Cave, so it's better to check it out first."
At this point, the Golden Crow had already retracted its divine ability and left the Ghost Cave.
However, the Yin Qi inside the Ghost Cave was extremely dense, so Wang Daoyuan did not dare to enter recklessly.
He released more than a hundred second-order mid-grade Soul Chasing Bees into the Ghost Cave to check out the situation.
The Yin Qi inside the Ghost Cave originated from the underground Yin Vein, so it was pure Yin Qi that would not directly harm living creatures.
Wang Daoyuan understood the situation inside the Ghost Cave through the connection between the Soul Chasing Bees and the Soul Chasing Bees.
After the Soul Chasing Bees entered the cave, there was a winding tunnel that extended more than four thousand feet underground.
At the end of the tunnel was the Ghost Cave.
The Ghost Cave was very spacious, occupying more than a hundred mu.
There was a huge crack that ran through the entire cave, which was more than one zhang wide. Dense Yin Qi gushed out from the crack, and its density was comparable to that of a mid-grade fourth-order spiritual vein.
There was nothing else in the cave, except for some traces left behind by refined corpses.
Wang Daoyuan recalled the Soul Chasing Bees and said, "The Ghost Cave is more than four thousand feet underground, and there is a crack in the Yin Vein.
Normally, to deal with this kind of cave, we can block the crack in the Yin Vein and connect it to the spiritual vein.
We can also dig out all the rock layers above the cave and use the sun to suppress the Yin Qi.
However, this cave is more than four thousand feet deep from the ground and the underground lava, so it's not easy to walk through.
Blocking it is not much use. If we can block it, they can open it.
The Ghost Cave is already empty, so let's go down and check it out before making a decision. "
Seeing that the Soul Chasing Bees could return alive, the monsters were not worried anymore.
Three monsters were left to guard the top, while the others entered the Ghost Cave.
After entering the cave, Wang Daoyuan checked the rock walls.
The rock had been nourished by Yin Qi for many years, and its hardness was comparable to a low-grade third-order blacksmithing material. It was not suitable for blacksmithing, but it could be used to build a fort.
The rock's hardness was not high, but if they were to do something underground, they would have to break through several hundred feet of rock layers.
If a low-grade third-order blacksmithing material were to break through several hundred feet, it would be a little scary.
If he used the Dust Returning Flame, it would not be a problem.
However, Wang Daoyuan did not want to expose his Spiritual Fire so casually. If he wanted to dig through the rock wall, he could only use magic to smash it.
In such an environment, it would be difficult to deal with the Netherworld Cave once and for all.
Another way was to find underground water veins.
Draw the water vein over, just like the Gui Water Nether Spring, and bring the Yin Qi out.
If this method could be realized, there would be a river at the entrance of the Ghost Cave in the future. Just like the Profound Yin Market, it would become a gathering place for evil cultivators.
At that time, it would attract a large number of heretical cultivators and let them slowly exhaust the demonic beasts.
The Yin Qi here was thick. The rocks had been nurtured for many years, so it was difficult for one's Divine Sense to penetrate them. One had to rely on the Spirit Seeking Compass to find water veins.
Wang Daoyuan took out the Spirit Seeking Compass and activated it. Spiritual light entered the rock wall to search for water nearby.
There were many rivers in the Heavenly Slash Mountain Range, so it was not difficult to find underground water veins.
There were three water veins in the vicinity of the Netherworld Cavern, and the closest one was over a hundred zhang underground.
Upon discovering the water vein, Wang Daoyuan's face lit up with joy.
Yan Hui quickly asked, "Brother Wang, have you thought of a way?"
Wang Daoyuan smiled and said, "I have indeed thought of a way. Since we can't seal the Yin vein, we can bring the Yin Qi out.
There is a very large underground water vein a hundred zhang underground.
As long as we open the underground water vein, the water will gush out and fill up the Netherworld Cavern.
At that time, a river will flow out of the Netherworld Cavern, and all the Yin Qi will be brought out.
When the cavern is filled with water, there will be no need to worry about refined corpses hiding here. "
All the demonic beasts nodded in agreement.
Wang Daoyuan marked the place on the ground where they were going to start. "Dig a hundred zhang underground from here and you will find the underground water vein."
A muscular man in brown armor stood out. "If you want to talk about this, I will be in high spirits."
This guy was a pangolin-type demonic beast with a cultivation base of the Fourth Stage.
Although his strength was not high, when it came to digging holes, no one could compare with him.
Wang Daoyuan smiled and said, "What a coincidence, with King Po Shan here, it won't take much effort to dig a hundred zhang deep hole."
He revealed his original form, which was a pangolin more than thirty zhang long.
After a while, his body shrunk to twenty zhang long, and his two front claws flashed with cold light.
His whole body flashed with brown light, and then he turned into a whirlwind, spinning on the rock stratum.
After two hundred breaths, a hole with a diameter of three zhang and a depth of more than thirty zhang was dug out in the rock stratum.
King Po Shan panted and said, "This rock stratum is really hard, it is so difficult for me to break through it with my Rock Breaking Divine Ability.
I have used too much spiritual power, let me rest for a while. "
The hole was not far from the crack where the Yin Qi was gushing out. There were also small cracks in the rock stratum, and pure Yin Qi was seeping out.
Wang Daoyuan felt a fluctuation similar to Divine Sense in this pure Yin Qi.
Near the Fourth Stage Spirit Vein, there was likely to be Heaven and Earth treasures.
He jumped into the hole and carefully examined the place where the Divine Sense fluctuation was coming from. There were many small cracks here.
He drew out a wisp of flame from the red-feathered crow and used the Vermilion Bird Fire Manipulation Technique, and the flame instantly soared.
The flame seeped into the cracks of the rock stratum, and the pure Yang Qi in it constantly consumed the pure Yin Qi in the rock stratum.
After burning for ten minutes, Wang Daoyuan used the Earth Splitting Technique to forcibly shatter the rock stratum.
After a quarter of an hour, he finally broke through the fifty zhang deep rock stratum.
Behind the rock stratum, there was a small space about three feet square, which was connected to the Yin Qi crack.
There was a strange flower growing in the small space. The whole plant was only one foot tall, and it had seven pitch-black leaves that were shaped like human hands.
On top of it was a blood-red flower about six inches in diameter, with seven petals. On each petal, there was a looming ghost face, and the ghost face was exuding a power similar to Divine Sense.
The alchemy inheritance that Wang Daoyuan exchanged from the Underworld Sect came from the Hundred Spirits True Lord.
There were many records of these strange spirit plants.
This spirit plant was called the Seven Leaf Ghost Face Flower, and it could grow into a fifth-grade spirit plant. Of course, the one in front of him was only a fourth-grade spirit plant.
The precious part of the Seven Leaf Ghost Face Flower was its petals.
After the flower bloomed, if the surrounding Yin Qi was dense enough, each petal would condense a drop of flower dew every hundred years.
After consuming this flower dew, it could strengthen one's Divine Sense cultivation and also restore the power of one's Divine Sense.
Moreover, after consuming it, there was no need to refine it. It could restore one's Divine Sense in half a cup of tea's time.
With Wang Daoyuan's current Divine Sense cultivation, even if his Divine Sense was exhausted, he only needed a drop of flower dew to completely restore it.
After the flower dew drops, it would be stored in the core of the flower to nourish the seeds.
The seeds needed a thousand years to mature, and during this thousand years, the flower would always be in a blooming state.
If too much flower dew was used, it would cause the seeds to mature later.
However, the flower couldn't always bloom. If the seeds couldn't mature after two thousand years, the flowers would wither, and the seeds wouldn't be able to survive.
A Seven Leaf Ghost Face Flower could grow seven seeds. When the seeds matured, they would absorb all the essence of the spirit plant, and the plant would wither.
The seeds had the effect of repairing the soul, but unfortunately it couldn't repair the Divine Sense.
Wang Daoyuan had the Ink Jade Lotus, so he didn't care about this function.
The seeds of the Seven Leaf Ghost Face Flower also needed a thousand years from germination to blooming.
This Ghost Face Flower had very little flower dew in the core, so it should have just bloomed.
In the space of the Spirit Pearl, the concentration of pure Yin Qi near the Gui Water Hell Flame was not lower than the Ghost Cave, so it shouldn't be a problem to grow the Seven Leaf Ghost Face Flower.
Coupled with the more than forty-two times faster flow of time, it would only take a little more than two years to harvest seven drops of flower dew.
Moreover, the flow of time in the space of the Spirit Pearl was gradually accelerating.
In the future, if he could reproduce more, he wouldn't have to worry about using his Divine Sense too quickly.
This Seven Leaf Ghost Face Flower must be obtained, even if he had to pay a price.
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