"Mt. Styx?"

The three kings of Yan, Zhao and Han all glanced at each other, and they all saw a trace of doubt in each other's eyes.

Obviously, they didn't know anything about the Underworld Mountain.

"Erchen will go back and send someone to investigate!" Zhao Ruyi reacted quickly enough to rise from the ground in an instant.

People from other countries also reacted one after another, returned home one after another, sent people to investigate the information, and even sent a large number of soldiers and spies to search for the people.

In just an instant, the national power of the three kingdoms of Yan, Zhao and Han was mobilized by Tang Yi with a mere immortal promotion order.

And just when the Three Kingdoms mobilized the power of the whole country to search for news about the Underworld Mountain, Tang Yi passed through the glacier and came to a wasteland.

Above the wasteland, at the foot of a towering mountain, a child was seen wrestling with a huge beast.

The beast was huge, with teeth and claws, like an enlarged lion.

In stark contrast, the child, who looked no more than ten years old, with a thin figure, stood in front of the beast as if he had been sent to death.

However, in the face of the huge beast, the child did not seem to have the slightest fear, but had a fighting spirit.

But when it comes to the real fight, this child still seems a little immature, and between the moves, it seems a little rusty, and it is always dangerous to avoid it, the fatal blow of the beast.

But it is precisely because of this that the child's combat level has also been rapidly improved.

"Roar!"

I heard an unwilling roar, and the child slapped out with a palm, hitting the head of the huge beast, and the huge body collapsed in an instant.

"Whew, Whew, Whew......"

The child was panting, but he was very excited: "This 'Prajna Palm' taught by Master is so powerful, my physical body has just reached the acquired realm now, if I reach the innate realm, it is estimated that it will be stronger, enough to protect the clansmen in the clan!"

As he spoke, the child lifted the huge beast's carcass and dragged it straight into the distance.

"I didn't expect that I taught Ah Wu so many exercises, but he chose martial arts in the end!"

It wasn't until Ah Wu walked away that Tang Yi's figure finally appeared, and he said softly: "But that's right, there is a lot of aura on the Pluto Martial Star, even if the people here don't cultivate the true exercises, but under the nourishment of the aura, the physical body is naturally strong, and cultivating martial arts is a faster way!"

For Ah Wu did not choose to cultivate the true exercises, but chose the martial arts exercises taught by himself, Tang Yi can also understand.

Seeing that Ah Wu was fine, Tang Yi was relieved, and when he was about to leave, he suddenly saw a group of cavalry in the distance, galloping wildly, coming to the foot of the mountain, opening a map, looking around, and then identifying the towering mountain peak not far away.

"This mountain peak is exactly the same as what is recorded on this painting, but I don't know if it is the 'Underworld Mountain' ordered to be found by the above!"

The non-commissioned officer who led the cavalry looked at the map in his hand and then at the mountain peaks not far away, and looked a little hesitant.

"That's it!"

With a wave of his hand, the non-commissioned officer summoned a few of his subordinates and ordered: "Go back, report to the higher-ups, and I'll take someone up to have a look!"

Before the words fell, this group of cavalry suddenly split into two, and the non-commissioned officer led a group of men and horses to go straight to the peak, while the rest of the people fell off their horses and turned back the same way.

"This is the Underworld Mountain?"

Tang Yi didn't expect that he would come over at random to see how Ah Wu was doing, but he found a clue to the Underworld Mountain.

Tang Yi's heart moved, and he immediately followed behind the team of cavalry who went to explore.

This mountain is extremely dangerous, and at first you can ride a horse up the mountain, but later, the mountain road is getting steeper and steeper, and if you are not careful, you may turn over on your back, and everyone has to dismount and go up the mountain on foot.

After most of them had walked, Tang Yi came to the foot of the mountain, and when he looked up, he saw that the peak was steep and warped, like a long knife, straight into the sky.

And when he arrived at the foot of this peak, Tang Yi clearly felt a strange aura, and suddenly his heart moved, and he slowly went up the mountain, following behind the previous group of soldiers.

This is the place where the three kingdoms of Yan, Zhao and Han meet, and Tang Yi doesn't know which country sent this group of soldiers, but it is obvious that these soldiers are well-trained elite soldiers.

Although the mountain was unusually steep, the soldiers were well trained, and they quickly went up a lot.

"Captain!"

At this moment, the soldier who was the leader suddenly pointed to the top of his head and shouted to the captain who was following him: "Look, is there a palm print on it!"

The captain of the team raised his eyes and saw that not far from the top of the peak, there was indeed a dent that looked like a palm print, although it seemed that it had been many years and looked a little blurry, but it looked somewhat similar.

"Let's go!"

As soon as the captain gave the order, the rest of the soldiers immediately stepped up, increased their speed, and climbed to the top of the mountain.

For such well-trained soldiers, even though the mountains are steep, they can climb extremely quickly, and it doesn't take long for them to come here.

"It's indeed a handprint, it seems that the person who left this handprint is still a top master!"

The leading captain looked at the handprint, only to see that the handprint was deeply imprinted on the hard mountain, even though it looked like it had been polished by the years, it still looked very clear, which showed that the person who left this handprint must be a top master.

"That's not right!"

However, the leading captain, who had been watching for a long time, suddenly changed his face and said: "This person deliberately collapsed this mountain, as if he wanted to bury something!"

The leader of the team, who was extremely observant, instantly noticed that the place where the handprint was left seemed to have been artificially collapsed, and just below that, there was a large pile of rubble.

As soon as the two were linked, the captain came to the above conclusion.

"Dig!"

Without the slightest hesitation, the captain quickly ordered his men to dig up the rubble.

"Yes!"

The soldiers responded in unison, ran to the pile of rubble, used their hands and feet, and began to carry the rubble.

It didn't take long for these elite soldiers to dig up a large pile of rubble, revealing a narrow passageway.

"It's weird!"

The passage was extremely narrow, and it was blocked, but it was all rubble, large and small, and it was clear that someone had deliberately tried to cover it up.

"Keep digging!"

The captain continued to order, and although the soldiers were tired and panting, they still did not complain in the slightest and continued to move.

It's just that this cave is extremely narrow, and it is inconvenient to excavate, and the speed is greatly slowed.