From Rat Bai's words, Yang Yiyun determined that the Rat King must know something about himself, but he was not sure how much he knew.

Yang Yiyun has his own plan and goals, and he can't die at this node.

So he had to take a risk.

The reason why he decided to take the risk was not just because he felt that the Rat King knew about his Terran identity.

The point is that since the Rat King sent the two little demons of Rat Bai and Rat Jin to invite him, it means that the Rat King didn't want to tear his face, otherwise, he just needs to inform the four major forces of the Ten Thousand Demon Mountain Range that he is a human race.

Instead, he came to invite him to the Five Elements Rat Demon Clan to see a doctor, which means that this matter is still negotiable.

At least for the time being, the Rat King won't reveal his identity.

Or maybe it's not too clear that the Rat King knows that he is a Terran, but he thinks he has a clue.

For Yang Yiyun, even if it was a little, he didn't dare to gamble, so he could only promise Rat Bai and Rat Jin to go to the Five Elements Rat Demon Clan to give their ancestors or rat kings to heal.

If he didn't go, it wouldn't be impossible, he would directly kill the rat and white rat Jin, and then take Lu Rouge Qingniu and them away, leaving the Ten Thousand Demon City and the Ten Thousand Demon Mountain Range.

But...... Leave...... Where can they go?

After leaving the Ten Thousand Demon Mountain Range, he was still in the middle of the wilderness, and Yang Yiyun dared to say that outside the Ten Thousand Demon Mountain Range, there must be people from the several holy lands he had offended who were waiting for him, and it was a master waiting for him to appear.

Therefore, even if he goes out now, there is still no way out.

Not to mention that the matter of promising Qingniu was not done, and in addition, how could he be willing to leave the Ten Thousand Demon Mountain Range like this?

Rather than this, it is better to compromise for the time being and take a gamble.

Follow Rat Bai and Rat Jin to the Five Elements Rat Demon Clan, go to meet the Rat King, if he wins the bet, he will have a powerful intelligence system, and if he loses the bet...... It's a big deal to run away again, anyway, if you want to run, I'm confident that no one can keep him.

Because he has the old man as his backing, and he has the Qiankun pot with him.

……

Outside the Ten Thousand Demon City, Yang Yiyun didn't bring anyone, and followed the rat and white mouse Jin brothers and sisters to the Five Elements Rat Demon Clan alone.

What he was going to was an unknown underground world, so he didn't take anyone with him, let the others stay in the Demon Doctor Pavilion, and of course he also told Qingniu and Pangolin that if he didn't come back for half a year, he would find a way to evacuate Ten Thousand Demon City, and then go out of the wilderness.

After walking out of the Ten Thousand Demon City, Yang Yiyun thought that he would have to travel a long way directly on land, but he didn't expect Rat Bai to smile and say, "Lord Doctor, please come with us." ”

In Yang Yiyun's doubts, Rat Bai and Rat Jin brothers and sisters walked out of a secluded place, one of them burst out of white light and the other emitted golden light, and then only heard Rat Bai whisper: "Open the way......

Although the rat vernacular was silent, Yang Yiyun felt the ground shake slightly under his feet.

A three-meter crack opened in the ground three meters in front of him a moment ago, gradually getting wider and wider, and in an instant, the width of the crack reached more than one meter.

A large hole appeared in the ground.

Yang Yiyun looked inside, but there was a hole in the ground with a width of one meter, two or three, extending down......

Seeing the underground passage that appeared, Yang Yiyun finally understood what the underground world of the Five Elements Rat Clan was, and every Five Elements Rat Demon Clan was a master of hole punching in this way.

If it was a huge group of Five Elements Rat Demon Clan, it didn't seem to be a difficult task to create an underground world.

At this time, I only heard Rat Bai say: "This is just one of the world's most innate attributes of my Five Elements Rat Clan, it's nothing, Master Doctor, please enter the teleportation array from here, and it won't take much time to enter the teleportation array from here, and it will not take much time." ”

This time it was Rat Jin who spoke, and his words revealed confidence and pride.

Yang Yiyun is really speechless about this, people are rat demons, and digging into a hole is the same as drinking cold water.

From this point, it can be seen that according to the hole-punching talent of the Five Elements Rat Demon, it is not impossible to open up the entire underground world.

Yang Yiyun felt more and more that if he could subdue the Five Elements Rat Demon Clan, or the Rat King, it would have a double effect on his future plans in the Ten Thousand Demon Mountain Range.

Then Yang Yiyun followed the rat and white rat and the golden brother and sister into the hole they had opened up.

After entering, he only heard the rat Bai say a closing, and the next moment the hole was reintegrated, although he was not on the ground at the moment, but he could fully imagine that there would be no traces left on the ground.

If the Five Elements Rat Demon wants to escape, dig a hole and get into it, there will be no breath left at that time, this race is simply a natural intelligence expert.

Yang Yiyun thought that if he didn't use this clan for his own use, it would be a violent thing.

……

After entering the passage, it has been inclined at a thirty degree slope and extends downward.

Originally, the rat hole in Yang Yiyun's imagination was very damp, dim and narrow, but in fact, it was the opposite.

Except for the passage opened up by Rat Bai and Rat Gold at the beginning, which is a dirt channel, the rest is simply a road that extends in all directions.

At first glance, you can tell that it is a passage that has been built a long time ago.

The whole passage is about nine meters high and more than nine meters wide, gradually sloping down, too steep is a kind of stone that is blazing, at the top of the passage is a fist-sized night pearl as lighting, and almost every three meters there is one.

There will be a forked passage along the way, which has been extended, and it is really an underground network that extends in all directions, and the dense night pearl lighting alone is enough to meet the wealth of the Five Elements Rat Demon clan.

Yang Yiyun couldn't imagine how such a huge project could be completed, and it would be a miracle if it was placed in the secular world.

Even more interesting is the passage with a water source and a faint breeze.

Rat Bai played the role of a tour guide for Yang Yiyun and said: "Some of the water sources are groundwater, some are diverted from large rivers and lakes on the ground, and each passage has vents every 100 meters, extending in the towering ancient trees on the ground, and some of the vents are opened up in the cliff high in the sky, which are very secret."

Whether it is the source of the water source or the source of the vent, there is a powerful and hidden formation enchantment, so it is very secret and safe.

The night pearls are collected from somewhere in the wilderness, the flame stone under our feet is a unique stone in the underground volcano, it is extremely hard enough to forge magic weapons, and the flame stone can play a role in driving away the cold without the ground, and can also create an environment suitable for the growth of vegetation.

Although our clan lives in the underground world, we have what we have on the ground, and we have more on the ground, and this is only some peripheral passages, so the conditions are not very good, and when we get to the front teleportation array, we will enter our royal city, and when we get to the royal city, the doctor is taking a look, where the passage is much better than here......"

Yang Yiyun listened to Rat Bai's smug explanation, and was really a little shocked, he was really full of expectations for the Rat King City in Rat Bai's mouth now.

I want to see as soon as possible what kind of underground world the Five Elements Rat Demon has created.

In fact, it was not far away, but Yang Yiyun calculated the time and walked for half a day to reach the teleportation array in the mouth of the rat white.

After walking for half a day, the passage was still inclined downward, and it was roughly estimated that they might have gone three to five thousand meters underground.

At this moment, he arrived at a huge space of nearly three hundred square meters, the whole space became a circle, and there was a circle of passages all around, Yang Yiyun thought that it should be a junction point here, and it might be hundreds of miles in a circle to converge and teleport again.

The entire space is made of flame stones, and in the center is a teleportation array, which looks very ancient, and the brothers and sisters of Rat Bai and Rat Jin took Yang Yiyun to step on the teleportation array and said, "Lord Physician is the royal city of my clan through the teleportation array." ”

Yang Yiyun nodded to indicate that he knew, and motioned for them to activate the formation.

The next moment, the power of space erupted from under his feet, and then a bright earthy yellow halo rose, and Yang Yiyun subconsciously closed his eyes.

I only felt a bout of dizziness......

After about a few minutes, a rat-white voice sounded in my ears, "Doctor, we have arrived at the Rat King City." ”

Yang Yiyun opened his eyes when he heard this, and his heart was suddenly shocked.

At this moment, he found that standing on an altar was the Teleportation Formation Altar, and the entire altar was actually a stout independent flame stone pillar.

The sound of magma came into his ears, and Yang Yiyun saw that the huge stone pillar was like an abyss on three sides, and the magma was below, at least a few thousand meters deep.

The flame stone pillar they stand on is very high, and hundreds of meters above their heads are huge karst cave rocks, and the strange-shaped stalactites hang upside down.

Thousands of meters away in the line of sight is a towering city.

Without asking, he knew that it was the Rat King City, and the city buildings with no end in sight appeared in a natural huge karst cave.