The bird beast on Yan Yangtian's back was activated again. It flew into the underground world without a sound and searched carefully again according to the map that Li Yao had developed. A lot of images and information were sent back.
"No demon beast nests or traps have been found. But we still need to be careful. Let's go down!"
There was a mine car system leading to the underground. However, after thousands of years of wind and frost, it was rather fragile.
Li Yao checked it again. It was not difficult to repair it. The only problem was that it would take at least one day to fully repair it.
They gave up on the mine cars and gathered together. Hong Tong activated the gravity technique and adjusted the gravity within five meters to one fifth of the standard gravity, which was one third of the Tian Yuan Realm's gravity.
Under such gravity, everyone felt as light as a swallow. Through the delicate control of the power rune arrays of the Crystal Suit, they floated to the bottom of the mine like six feathers. Sometimes, they would step on the wall of the mine and gain a lot of acceleration.
"Bo! Bo! Bo! "
While they were descending, Li Yao released more thunderbolts and scanned every crevice and working surface. The 3D map was clearer and more detailed.
Soon, the steep tunnel became smooth. There were more forks on the left and right. In front of them were the remains of several abandoned mine cars. They were about to reach the bottom of the mine.
Illuminated by the feeble brilliance of the crystal suit, thousands of colors were reflected on the walls of the cave, as if they were frozen rainbows. The rocks were growing recklessly like clusters of crystals. They were as splendid as a splendid underground palace.
One-eyed giant mushrooms were growing in the crevices of many clusters of crystals.
Different from their cousins on the ground, these giant mushrooms were tall and slender like beautiful girls. Their bodies were full of green scars. A faint purple mist lingered around his body, swaying gently as if he was singing and dancing.
On the Mystic Ice Planet. There were more than thirty kinds of Heavenly Materials and Earthly Treasures, such as Mottled Stones and Thunder Diamonds.
The light was emitted by these minerals.
However, most of the minerals were produced in the Tian Yuan Realm. Also, they were too large to be mined. It was meaningless to bring them back.
What they needed were the small but valuable nine-holed stones and Spirit-melting Crystals.
"Keep moving forward. Pay attention to the giant underground mushrooms. If the green spots on their bodies have red lines, it means that there are Nine Orifice Stones and Spirit Melting Crystals next to them. The hallucinogenic properties of these giant underground mushrooms are ten times stronger than the Cyclops mushrooms on the surface. Even Foundation Establishment cultivators can easily fall into their illusions! "
Before Hong Tong could finish his sentence, countless light ribbons suddenly floated out of the crevices. They looked like hundreds of translucent fluorescent ribbon fish floating in the air, emitting a frigid aura.
The temperature in the mine suddenly dropped by more than ten degrees.
Even with the protection of the Crystal Suit and the spiritual tattoos, Li Yao still felt a bone-chilling coldness.
These "hairpins" did not have a physical body, but they seemed to have a certain level of intelligence. From the two holes in front of his body, two bluish flames of ice were shining. They locked onto the six Orb Patrollers very soon.
"Did you see it?" Li Yao asked in a low voice. He wanted to make sure that it wasn't his imagination.
"Yes, I saw it. It's not an illusion. It's a type of spiritual body named 'Devastating Icy Spirits'."
'Swallow' Yan Yangtian explained quickly, "Such Devastating Icy Spirits often appear on ancient battlefields. They are special spiritual bodies created by the combination of the last bit of killing and destruction left by the deceased and the environment of the battlefields. They are not ghosts, but they are more aggressive than ghosts.
"The underground of Mystic Glacier. Ice fiends were everywhere. Some of the ice fiends would leak out from the small cracks in the ground. After thousands of years, the last bit of killing intent of the deceased has been combined with the last bit of killing intent. After thousands of years, they have become Devastating Icy Spirits! "
At this moment, almost a hundred Devastating Icy Spirits had gathered in front of them. The entire underground world was dyed blue by them.
They were shrieking soundlessly, but Li Yao had a weird feeling that steel nails were rubbing against glass.
The Devastating Icy Spirits shrank their bodies and lunged at Team Blue Bronze like sharp arrows!
"Tactic No. 6 to deal with ghosts, activate!"
Hong Tong bellowed and smashed his fists to the sides. A lot of broken minerals were blown off from the walls of the cave, which were attracted by his gravity control and formed a Stone Crushing Array.
Many Devastating Icy Spirits crashed into the array and froze the minerals into blocks of ice. After a few cracking noises, they shattered into pieces and fell to the ground.
But because of this, a lot of spiritual energy of the Devastating Icy Spirits was consumed. The gloominess and coldness soon dispersed.
Ding Ling Dong took the opportunity and took the lead. Her Crimson Phantom Battlesuit emitted scorching redness in the darkness. Her arms turned into two fiery dragons, one red and one blue, which rushed out and swallowed all the Devastating Icy Spirits.
The Devastating Icy Spirits screamed miserably in the fire and melted into blue liquids.
A few Devastating Icy Spirits tore apart the fiery net and moved forward, only to be blown into pieces by 'Shell' Leng Ziming's explosive bullets that were engraved with fire rune arrays.
From the beginning to the end, only two Devastating Icy Spirits had reached the front of the team, but they were also chopped into pieces by Li Yao's Boiled Blood Wind Slashing Saber.
In less than ten minutes, the cave was clean. There was not a single Devastating Icy Spirit left.
"There shouldn't be any ancient experts in this ancient battlefield. The Devastating Icy Spirits swallowed the fighting will of common soldiers. Therefore, the Devastating Icy Spirits they produced were not very strong.
"If the Devastating Icy Spirits produced by the combination of the fighting will of ancient experts and the enormous Devastating Icy Spirits in the depths of the cave, they would be extremely horrifying!"
Hong Tong was greatly relieved. After cleaning up the battlefield, the team moved on.
After passing the debris of the tank, they arrived at the main working area of the underground cave.
The debris of several Crystal Suits were scattered in a corner. Li Yao examined them and found that none of the Crystal Suits were equipped with weapons. Their structure was different from that of a battlesuit, too. They should be the mining Crystal Suit of common miners. They were broken into pieces and turned into glittering powder very soon.
Li Yao secretly clicked his tongue.
"I've long heard that in the Star Ocean Imperium, the Crystal Suit technology had been developed to the peak. The Crystal Suit was popularized in the society. Not just Cultivators, even ordinary people had their own Crystal Suit.
"Now that I've seen it with my own eyes, I can confirm that even mining is a Crystal Suit. As a result, ordinary people can work in harsh environments, which significantly improved the efficiency of resource collection and utilization for the entire civilization.
"No wonder the Star Ocean Imperium dominated the universe for thousands of years. It became one of the strongest empires in the history of mankind!
"The Xing Yao Federation still has a long way to go!"
While he was thinking … Ding Ling Dong's excited exclamation came from the communication channel.
"Found it!"
She found a Nine-holed Stone near a bunch of Cyclops Mushrooms.
The Nine-holed Stone was a kind of ore the size of a thumb. Every Nine-holed Stone had eight to nine tiny holes in a weird arrangement. They looked like a tiny human face with three or four eyes, complete with a nose, a mouth, and ears.
When some Nine-holed Stones were collected, a bright gray liquid would flow out of the 'holes', which would be frozen five seconds after it came into contact with the air. It was the 'Spirit Melting Crystal'.
"Excellent. We found a Nine-holed Stone so quickly. It seems that we are quite lucky this time. Let's take a ten-minute break before we start collecting!"
Captain Hong Tong waved his hands. Li Yao took out six round barriers from his Cosmos Ring and found a flat ground in a corner of the cave.
The moment the barriers were opened, the air inside and outside the cave was separated.
Then, he took out a Purging Rune and purified the air inside the barriers into breathable air. Finally, all the teammates took off the Crystal Suit in turn. They took two high-energy nutrition drugs.
Although Building Foundation Stage Cultivators could go days without food or drink, they might be faced with fierce battles at any moment. It was better to keep the reserves of spiritual energy in their bodies as much as possible.
After the break. Team Blue Bronze searched all the working surfaces. They cleared four waves of Devastating Icy Revenants and set up six defense rune arrays before they started collecting.
Everybody was divided into two teams. 'Swallow' Yan Yangtian and 'Shell' Leng Ziming formed a two-person reconnaissance team. They returned to the surface and started a spiral search with the cave as the center.
On one hand, they were exploring the map. On the other hand, they were ensuring the safety of the cave.
As for the other four … They started searching for Nine-holed Stones and Spirit Melting Crystals near the Red Stripes Mushroom.
Although it was the first time that they had collected Heavenly Materials and Earthly Treasures in an Occult Orb, the Hundred Smelting Clan was a refining sect forty thousand years ago. Of course, there were many secrets about the collection and utilization of Heavenly Materials and Earthly Treasures. After absorbing Ou Yezi's memory pieces, Li Yao had grasped a lot of secret arts, too.
Therefore, although he was a bit clumsy at the beginning, Li Yao's collecting speed soared. By the next morning, he had already surpassed Captain Hong Tong.
By the next night, he had filled a Cosmos Ring to the brim and had to use his own personal Cosmos Ring. His collection was much more than that of Hong Tong and 'Dummy' Ba Weiqi combined.
Ba Weiqi didn't believe it at first. He thought that Li Yao might have picked up a lot of minerals around the Nine-holed Stones because he was too clumsy.
But at night, when everybody gathered in the barrier to sort through the materials, they found that Li Yao had collected the most and the most pure Nine-holed Stones. There was not the slightest impurity on any of the Nine-holed Stones, and more than ninety percent of them were rich in Spirit Melting Crystals.
"Vulture, why are your eyes so sharp? You've collected all the best Nine-holed Stones!"
'Dummy 'Ba Weiqi scratched his head in confusion. He couldn't figure it out at all.
"Maybe it's because I was born with Heavenly Materials and Earthly Treasures."
Li Yao was excited, too. He had only known the skill of collecting Heavenly Materials and Earthly Treasures in theory before. But after the exploration trip to Mystic Glacier, he had made a lot of progress.
Nine-holed Stones and Spirit Melting Crystals were not the rarest Heavenly Materials and Earthly Treasures.
If he ran into truly unique Heavenly Materials and Earthly Treasures in the future, such a collection skill would be very useful.
Just as everyone was talking and laughing, 'Shell' Leng Ziming returned to the mine with a chilling aura. The news he brought caused everyone's smiles to freeze instantly.
The reconnaissance team found traces of the demon clan 324 kilometers away.
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