Yiyun Lei and Rao Ya huddled in a small boat that could only hold two people, drifting towards the dark underground river. But I heard the sound of water in my ears. The boat was jolting and rushing straight towards the deep, dark place.

In the darkness, Yun Lei and Rao Ya, who hugged tightly, could sense each other's body temperature and breathing very clearly.

Of course, there is also a clearer understanding of the ups and downs of each other's bodies. Between Yunlei and Raoya. Everything that should have happened has already happened. It's just that because there were too many changes in the Yin and Yang Reincarnation Array that day, the two of them didn't even have a chance to reminisce.

The two of them are now reliving old dreams.

Yun Lei gently kissed Rao Ya in the dark, in the violent turbulence of the boat, but felt that in the darkness of this heaven and earth, everything should be as it was when we first met that day. Heaven and earth are like this, wrapped in darkness, without beginning and without end.

And the body went with the ship. Every violent bump and collision in this row of ships began to become full of interest. There are too many rugged and bumpy rocks in this underground river. The boat struck the rocks of the river many times.

Fortunately, when Yunlei bought this small boat back then, he directly bought the one with the highest price, the most complete materials, and the strongest hull, regardless of whether he could use it or not. Otherwise, it is this continuous impact that will definitely disintegrate the ship.

What's more, this rugged underground river itself is definitely more than just bumpy and bumpy. The most important thing is that it still has a time to fall from mid-air. This is the endless underground river, which encountered the place where the cliff was, and then it suddenly fell.

This kind of fall is extremely beautiful in the outside world, and it can be called a rainbow, but for Rao Ya and Yunlei today, it is like a bungee jump in the air. Although it was said that both of them were cultivators and would not be really injured, the feeling of falling from mid-air all of a sudden still made people's hearts flicker. This is the innate instinct of life.

This is true even if Yunlei and Rao Ya are no longer afraid of the height of these tens of meters.

Yun Lei hugged Rao Ya, in this small boat, he didn't dare to move, and he was helpless. He was already pretty sure that he and Rao Ya had completely forked the road. At least, according to the direction of the spiritual fire of heaven and earth and the route traveled recorded in the soldiers' notes of the Prussian expedition members, it was a fork in the road.

However, for a while, Yun Lei had no other way. The situation under the earth is very varied. The space gourd that he had used to move quickly had now lost its usefulness. Even if Yunlei wants to use space jumping, he must determine the target of the jump, in other words, it is necessary to determine the spatial coordinates of the jump.

Otherwise, blind spatial movement will only be death in this dark and deep underground.

If Yun Lei accidentally moves into a dense boulder or soil layer, then this boulder and this thick soil layer will bring a huge squeeze to Yun Lei in an instant. Even if Yun Lei is not dead, he will definitely be seriously injured.

After all, under this underground, every inch of land can withstand tens of thousands of tons, or even 100,000 tons, or millions of tons!

And Yun Lei can't wantonly destroy the structure of this underground space. After tens of millions of years of evolution, the supporting structure of this underground space has reached a balance, and once it breaks a point, it may cause a series of earth-rock structure collapses.

And once the earth-rock structure in this deep underground collapses, the sky will fall. Not to mention, will this dark earth layer directly bury the clouds and thunder deep underground, so that it will not even have a chance to escape. Even if Yun Lei could escape, he wouldn't dare to do so.

Who knows, will this kind of serious landslide with unforeseen consequences lead to this thick layer of soil, completely burying the path to the underground magma, where the spiritual fire of heaven and earth is located, and there is no chance to even dig up and find it?

At that time, Rao Ya's flesh and blood body was hopeless to save, and Yun Lei had to regret and blame himself to death.

Therefore, Yun Lei could only hold Rao Ya and go with the flow. Anyway, he still has the opportunity to find the spiritual fire of heaven and earth in this underground space. It's better than having no chance at all.

And Yun Lei hugged Rao Ya, lying in the boat, drifting with the tide for a long time, after countless perceptible and imperceptible impacts, after a cliff fall that lasted for more than ten seconds, and the huge impact of the current, the boat they were in made of special steel and titanium alloy finally calmed down, as if it stopped in a stable place.

Yun Lei and Rao Ya breathed a sigh of relief, opened the partition in the cabin, and looked out, a sight to behold. Let Yun Lei and Rao Ya be dumbfounded.

Where the boat stopped, it was an underground space so large that it didn't even know the edge. In this underground space, there is a river that is flowing quietly. And on both sides of the river was a vast expanse of land that they could not see the end of. And in this dark and vast land, little by little, fireflies emerged from the darkness.

At first, it was like the stars in the night sky, and then, gradually, it became a faint and hazy light in the darkness. These rays of light, in the darkness, float gently. Let everything in this dark world show a hazy outline.

In this deep and dark land, the ubiquitous fireflies actually illuminate the whole world in a continuous manner. Although its brightness cannot be compared with the daylight of the outside world, it can also be compared with the dawn when the sun's light has overflowed and refracted partly, filling the heavens and the earth, and the sun has not risen in the right eight hundred years. Between heaven and earth, that hazy clear light.

Yun Lei and Rao Ya don't need any spells or special abilities at all. You can see the distance of about tens of meters outside your body.

Yun Lei and Rao Ya Dan saw that behind them, there was a wide waterfall that was tens of meters high, gushing down in the air. The sound of the water was loud, like thunder. It seems that this is where they came from. And the cliff that swells down this waterfall and the current where the boat stops are also different from the usual. Something seemed to grow in the water, and on the damp cliffs. Let the river under this boat, and on the cliff, also come out little by little.