Yu Tianxiao and Lan Xing'er flew deeper into the main cave at a very fast speed, and as the two continued to fly deeper, the distance between them and the entrance of the cave became farther and farther, 800 kilometers, 1000 kilometers, 1200 kilometers...... As they continued to go deeper, they also encountered a few monsters on the way, but none of them were very strong, and the strongest was the Beastmaster level, so they were easily solved.

When the two flew to a depth of 1800 km, brush! Brush! I couldn't help but immediately fall to the ground and didn't fly any further. After falling to the ground, Yu Tianxiao couldn't help but whisper to Lan Xing'er: "How deep is this cave, we haven't even found out where its end is after flying so far away!" ”

"I'm feeling a little weird, so do we want to keep flying in?" Lan Xing'er suddenly hesitated a little about her previous decision, because this cave is too deep and too deep, if they really encounter any big danger, I'm afraid it won't even be too late to run at that time, after all, no matter how big the cave is, it's better to be outside, so at this time she asked Yu Tianxiao, under normal circumstances, when it comes to really big things, she will still let Yu Tianxiao make a decision.

"Fly! Of course, we have to keep flying in, we have come here, we must not give up all our efforts, even if there is danger, we will fly until the end, rest assured, I will definitely take you out of this cave alive. Yu Tianxiao was silent for a moment, and then said so firmly.

"Hmm!" Lan Xing'er listened to Yu Tianxiao's words and didn't say anything, just nodded heavily.

"Alright, let's move on!" Saying that, the two couldn't help but swish! Sou! Jumped up again and continued to fly deeper into the cave.

In this way, the two flew again for almost two hours, a distance of more than 3,000 kilometers, and finally reached the end of this big cave, which means that this huge cave is more than 5,000 kilometers deep.

When Yu Tianxiao and Lan Xing'er arrived at the end of the cave. I was immediately surprised to find that there was a huge lake, a waterhole to be exact. But the waterhole is so big that it is just right to cover the entire length of the cave, and at first glance it looks like a small lake.

The cave is 800 meters high and 500 meters wide, which only refers to the size of the entrance of this cave, and the height and width of each place are different as you go inside, and the height and width of some places are more than a kilometer. the width is more than six or seven hundred meters; In some narrow places, the height is six or seven hundred meters, and the width is three or four hundred meters. At this moment, Yu Tianxiao and Lan Xing'er are located in the deepest and most extreme ends, the height is more than 1,500 meters, and the width is more than 1,000 meters. It's not an exaggeration to call it a lake.

However, the size of this waterhole was not the most surprising thing for Yu Tianxiao and Lan Xing'er, the most surprising thing for them was that the water of this big waterhole was actually blood-red. And the color is very bright, as if it is a pool of real blood, which makes people feel a kind of creepy at a glance. A feeling of trepidation.

At this moment, the two of them stood by this pool, looking at this pool of blood. Don't know what to do for a while? After observing the waterhole and the environment around the cave for a while, Yu Tianxiao couldn't help but immediately whispered: "Everything is normal in other places here, but this pool of blood-red water is really strange, otherwise, you wait here first, I'll go down to the waterhole and take a look to see what will be inside?" ”

"Don't go, seriously, I'm a little scared now, this pool of water is blood-red, just like real blood, and I can't see the bottom at a glance, who knows what the situation is below, what if you go down and encounter great danger? Let's think again. Lan Xing'er said to Yu Tianxiao while looking at the blood-colored pool.

"Alright then!" Yu Tianxiao said immediately. Seriously, looking at the bottomless blood-colored waterhole in front of him, Yu Tianxiao was also a little stunned in his heart, the biggest danger in the world is undoubtedly the danger you don't know, once you know, it's not terrible, because even if you can't solve it, at least you can escape, but for the unknown, it is definitely not to go or stay, maybe it is an opportunity for you, a place to make a fortune; Maybe it's a trap, as long as you take a step further, then you will definitely die, and Yu Tianxiao is in such a state at this moment.

Just when the two of them were pondering and didn't know what to do, suddenly, they couldn't help but immediately notice that the pool of blood-red water was actually bubbling up! At first, there were a few bubbling places, but gradually, there were more and more bubbling places, and after a while, I saw that the whole pool seemed to be boiling all at once. Goo! Bubbling non-stop.

Seeing this scene, both of them were almost stunned! Then they couldn't help but put their eyes on the detector in Yu Tianxiao's hand, and at this look, both of them couldn't help but gasp, because they saw that the screen of the detector displayed a huge energy fluctuation! Although this energy fluctuation was not as large as the energy fluctuation when the beasts appeared before, it was also larger than any energy fluctuation they had encountered before, and it was obvious that this huge energy fluctuation came from the blood-colored pool under their feet.

At this moment, because they don't know what the energy fluctuations in this pool are coming from, they don't know whether to retreat or stay here.

In the past, when they found energy fluctuations, they could use the detector to detect what the energy source was, and those energy sources were either energy crystals, or monsters, or humans, etc., in short, they were all specific objects.

But what is unbelievable is that in this puddle in front of you, the detector can only detect the energy fluctuations inside, but it can't show what the energy source is, only to see that what is displayed on the detector screen is a large blurry image, and nothing else can be seen!

Looking at the blurred image, Yu Tianxiao and Lan Xing'er were both full of doubts, but they didn't know how to deal with it? However, just when the two of them were trembling and at a loss for what to do, suddenly, boom! I saw that with the sound of the earth shaking the mountain, the water of the entire waterhole couldn't help but explode all at once, and the blood-colored splash was splashing everywhere like blood, standing on the edge of the pool, Yu Tianxiao and Lan Xing'er, who had not had time to react, were suddenly splashed with blood-colored pool water.

Seeing this sudden situation, I saw Yu Tianxiao and Lan Xing'er couldn't help but swish! Sou! Reflexively, it flew backwards quickly, and in the blink of an eye, it flew several kilometers away before landing on the cave floor.

As soon as the two of them landed on the ground, they couldn't help but be immediately shocked to find that a monster more than 30 meters tall and covered with blood-red scale armor, looking like a dinosaur in the ancient period of the earth, emerged from a waterhole and stood in front of them.

It is said that it looks like a dinosaur, but there is a big difference between it and dinosaurs, because dinosaurs have four legs, but the monster that appears in front of you has eight legs. Four of them are long, four are short, and all four long legs are used to support the body, and the four short legs are like human arms, each holding four bizarre, long black club-like weapons. Looking at the huge head again, it looked like a small hill, and the two huge blood-red eyes looked like two small craters, ready to erupt fire at any time. A huge mouth can swallow ten or eight people in one bite.

Looking at the monster that suddenly appeared in front of them, Yu Tianxiao and Lan Xing'er were really stunned this time, because this was definitely the first time they had ever encountered such a strange monster.

Looking at this extremely strange monster, Yu Tianxiao couldn't help but muttered secretly in his heart, why could the monsters they encountered in the past use the detector to detect its shape, or even its type, and it could be detected from a long distance, but why couldn't it be detected when the one in front of them was so close?

Thinking of this, Yu Tianxiao couldn't help but immediately activate the smart arm guard to search for the monster's information, but what was puzzling was that when the blue light of the smart arm shone on the monster, the screen of the smart arm guard was blank, and no information was displayed!

When Yu Tianxiao used the smart arm guard to search for the monster's information, Lan Xing'er also immediately used her own smart arm guard to obtain the monster's information, and the result was the same as Yu Tianxiao, her smart arm guard screen was also blank, and there was nothing!

Seeing this, both of them were dumbfounded! At this time, Yu Tianxiao couldn't help but scolded softly: "Damn!" Is this winning the cosmic lottery? ”

"That's right! And it's a big win! Lan Xing'er stood aside and answered softly. (To be continued......)