After absorbing the Nightmare Beast's energy, Wang Chong's Psychic Energy had grown to seven or eight times its original level. This level of Psychic Energy was enough to strike fear into the hearts of the vast majority of martial artists, including the titans of the martial arts world. This was also the basis for the information he had gathered underground.
The range of Wang Chong's Psychic Energy was one thousand meters. Although this wasn't too far, it was more than enough for Wang Chong to gather the information he needed from the underground river.
Wang Chong swam through the river like a fish, all sorts of information pouring into his mind.
"How is it?"
Jili Laozu asked, his eyes shining with anticipation. Wang Chong's immense Psychic Energy was no longer a secret to him.
"The underground metal vein is winding. Although the location of the underground river hasn't changed much, the direction of the vein is very different. Any place with a thickness of more than one hundred meters isn't worth considering. "
Wang Chong pondered, his expression extremely calm.
Jili Laozu nodded. He had great faith in Wang Chong's ability and judgment.
"… In addition, if we want to use the underground river to dig through the metal vein and bypass some of the checkpoints to get to the back of the palace, that's practically impossible under normal circumstances. However, nothing is absolute. The veins can be deep or shallow, thick or thin, and we also have to consider the distribution of the palace within the vein. As long as the vein isn't completely stable, we'll be able to find a chance.
"Moreover, although the underground river is very far from the palace, above the river is the rock layer, and above the rock layer is the metal vein. In some places, the rock layer is very thin, but the metal vein is very thick. In other places, the rock layer is very thick, but the metal vein is very thin. We'll need to investigate this according to the situation. And if the latter appears, that'll be our chance. "
Wang Chong raised his head. His eyes were bright, even in the dark, ice-cold underground river, they were still glistening, flickering with the radiance of wisdom.
Jili Laozu looked at Wang Chong and couldn't help but nod.
He didn't completely follow Wang Chong's train of thought, but the spirit, willpower, and aura that Wang Chong exuded made him involuntarily influenced. From Wang Chong's body, he could see a very precious vitality. It seemed that no matter what kind of predicament or danger he was in, this young man beside him would not easily give up.
He was like a burning candle. He would never give up until the last ray of light was extinguished. In his belief, there was always hope.
This caused Jili Laozu to sigh with emotion.
After grinding in the world of sects for so long, it was very difficult to find this kind of passion and edge.
Hualala!
The two of them continued to swim forward, exploring the darkness.
During this process, the ore vein above them shuddered three more times, each time accompanied by the loud rumbling of gears. No one knew what was happening above, but the pair knew that the battle was only getting more and more intense, that more and more people would be buried above.
Each of them was using their own methods to advance toward the core of the Origin Immortal Treasury. Wang Chong and Jili Laozu were doing the same.
Time continued to pass, and the green leaves on their bodies continued to be consumed.
The pair swam through the river for a very long time, and the further they went, the more dangerous it became. The pair even considered that if they failed, they would have to make sure that they had enough oxygen to swim back to the surface.
"Found it!"
After some time, just when the underground river was about to completely separate from the metal ore vein, Wang Chong's body trembled and he raised his head, his eyes bright as he looked into the depths of the river.
"What's wrong?"
Jili Laozu hastily asked in alarm. In this aspect, his Gonggong Divine Art was completely useless, so he could only rely on Wang Chong.
"I can't be sure for now, but the rock layer here is the thickest I've ever encountered. In other words, the ore vein in this region is theoretically the thinnest, and it's also the one with the highest chance of allowing us to enter the core of the Origin Immortal Treasury.
"But this is all just theory. We still need to confirm the location of the palace in the ore vein. If the palace isn't here, it means that our method won't work, and we'll have to go back the way we came. "
Wang Chong said. He stared upward, his eyes unblinking.
The rock layer he had encountered so far had all been around six hundred meters thick, but this place was the most unique. The rock layer was seven to eight hundred meters thick, and the ore vein had suddenly slowed down here, becoming much thinner.
Jili Laozu's expression tightened at Wang Chong's words.
"Whether it is or not, we can only do our best. I hope that the situation we're worried about won't occur!"
Jili Laozu nervously said as he looked upward.
Wang Chong said nothing, only nodded.
Bang!
In the next moment, a majestic mental power that seemed to have solidified shot out of his brain. After passing through the rocks hundreds of meters above him, it did not continue to explore as it usually did. Instead, it suddenly shrank and gathered at one point, forming a white silver needle. With a boom, it heavily hit the bottom of the hard and dense metal vein above him.
The two collided, and in an instant, an invisible sound wave immediately spread into the interior of the mine.
"Buzz!"
In an instant, Wang Chong focused all his attention on listening. The Lone Silence Ancestor also had a nervous expression on his face. Although his Psychic Energy was not as strong as Wang Chong's, his senses were still very strong. Although Wang Chong had not given him a detailed explanation of his methods of investigation and verification, the Lone Silence Ancestor was able to glean a few things from his actions.
Obviously, Wang Chong was using sound to test the "real situation" inside the ore vein and determine the location of the underground palace.
Time passed slowly. The surroundings were dead silent, and only the sound of the flowing underground river could be heard.
Wang Chong and Jili Laozu stood in the cold river without moving. Only their hearts were pounding in their chests.
One second, two seconds, three seconds … The sound spread in the ore vein, and Wang Chong listened carefully.
"It still doesn't work?"
Wang Chong mumbled to himself, unable to hide the disappointment in his eyes.
On the other side, Jili Laozu was also observing Wang Chong's expression. Seeing Wang Chong's reaction, Jili Laozu also felt a little lonely. He already knew the result without Wang Chong saying it in detail.
Just when the two of them were feeling down to the bottom, buzz! Suddenly, a faint echo was refracted and fell into Wang Chong's perception.
This echo was very weak, almost like the buzz of a mosquito. If it was not for Wang Chong listening carefully and concentrating, he would not have noticed it at all.
"No … this sound!"
In an instant, Wang Chong's body trembled, and his eyes suddenly widened. His eyes were extremely bright.
Sound would only be refracted when it encountered a different medium. In other words, in the direction where the echo was transmitted, the density of the metal changed.
The interior of the metal ore vein was extremely dense, and he and Jili Laozu were at the bottom of the metal ore vein, the last place of the ore vein. Under normal circumstances, such a situation would not occur. There was only one explanation for the echo —
The place where the echo came from was where the underground palace was.
"Boom!"
Thinking of this, Wang Chong's spirit was greatly lifted. Without thinking, he suddenly struck out with his palm.
In an instant, a majestic Gang Qi suddenly exploded at the top of an underground river thirty meters away from Wang Chong.
In an instant, accompanied by an earth-shattering explosion, dust billowed, and mud and sand fell. A pit about half a meter in diameter immediately appeared above the underground river.
"Senior, I'm afraid we'll need your help next. Go up from here, all the way through the rock stratum above. The passage we're looking for is likely to be there. "
Wang Chong suddenly turned his head and looked at Jili Laozu.
"What! Young Master Wang, you mean …! "
Jili Laozu trembled in excitement.
Wang Chong said nothing, only smiled and nodded.
"How, how could this be!?"
Jili Laozu was struck dumb.
Although he and Wang Chong both hoped to find a secret passage from the underground river to the Origin Immortal Treasury, the probability of such a thing was extremely low. Thus, when Wang Chong told him that there really was such a passage, Jili Laozu found it rather hard to believe.
"I don't know the specifics, but a special echo has appeared in the metal ore vein. Based on the time and location of the echo, the ore vein is ten-some meters thick. If we're lucky, we might be able to use this to enter the core. "
Wang Chong said.
Wang Chong and Jili Laozu said no more. Working together, they began to dig up the pit at the top of the underground river.
The rock stratum here was six to seven hundred meters deep and extremely tough. But neither Wang Chong nor Jili Laozu were ordinary experts.
Jili Laozu in particular. In other aspects, he might have been lacking compared to Wang Chong, but when it came to matters related to water, including digging a passage through the rock stratum at the top of the underground river, not even Wang Chong could compare.
Rumble! Jili Laozu stood in the pit like a god, the water of the underground river transforming into a furious torrent that washed against the pit.
He dug a passage through the rock stratum at an astonishing speed.
Time passed by quickly. About ten minutes later, Wang Chong and Jili Laozu finally dug a passage that was six to seven hundred meters deep through the rock stratum, reaching the top of the metal ore vein.
"We're finally here!"
Looking at the bronze ore vein before them, Jili Laozu and Wang Chong's faces were slightly pale. In order to dig this passage, both of them had expended a lot of their Stellar Energy, and they had used up another leaf.
"This is the last leaf. We have about the time it takes to brew a cup of tea. After ten minutes, whether or not we can dig through the passage, we'll have to leave. Otherwise, there won't be enough air for us to return. "
Wang Chong handed over the last two leaves in his hand and stuffed the last one into his mouth.
All of the leaves had been consumed by now.
"Mm!"
Jili Laozu nodded, his expression turning grave.
After stuffing the leaf into his mouth, Jili Laozu quickly raised his head to look at the metal ore vein.
Bang!
With a flick of his finger, Jili Laozu sent a bolt of Stellar Energy exploding into the ore vein.
This time, it only took a moment for a loud and clear echo to reach his ears.
"Yes, it's here!"
If Jili Laozu had been skeptical of Wang Chong's words at the start, Jili Laozu was now completely convinced. There truly was a hidden passage here.
"I really can't believe that such a thick and sturdy ore vein would leave behind a secret passage here. It's said that the Origin Immortal Lord could predict the future. Did he make a mistake in his divination? "
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