Nature! It was impossible to use the cyan ball anymore, because there was not much qi left in Liu Fei's body. Another reason is that I am afraid that the top will collapse and completely block this passage. Of course, this is not the most important, if the landslide suppresses Liu Fei himself, he will call it 'the heaven and the earth should not be called the earth'.

A handful of Qingfeng hands appeared, Qingfeng sharpened iron like clay, and after a while, he dug a large hole in the boulder for one person to pass through.

Liu Fei drilled through, and inside was a gap that was the width of a person's shoulders and five or six meters high, and the walls around it were a little wet, and the underground river in the cave just now passed through from the side.

After walking for hundreds of meters, this gap came to an end, and a straight upward crack appeared, but fortunately, the height could be seen clearly, about thirty or forty meters.

Qingguang wrapped his hands, and Liu Fei's hands were inserted into the hard stones, gradually climbing upward.

The space to climb up suddenly opened up, and it turned out to be a karst cave, but it was much smaller than the one just now.

The cave was filled with water, and the stench of these stagnant water was incomparable, and Liu Fei frowned.

Looking upwards, the cave is extremely high, reaching a height of fifty or sixty meters at the top.

Liu Fei flowed into the water, the sound of the water seemed to stir up something, and Liu Fei felt his head swell for a while.

When I looked up again, I realized! On the top of the rock face are densely packed with bats, counting tens of thousands.

What surprised Liu Fei the most was that there were traces of qi in the bodies of these bats.

And it was these little guys who made Liu Fei's mind swell. Bats emit ultrasound waves to find their way! One or two ultrasonic waves may not be nothing, and you can't hear them anyway, but when tens of thousands of ultrasonic waves converge, it is not a matter of whether you can hear or not, and the ultra-high frequency vibration of the surrounding air will make you unbearable.

Liu Fei was angry and resisted! However, as soon as the qi leaves the body, it will disperse. Liu Fei, who couldn't gather his breath, had no choice but to continue to move forward.

However, this cave is not big, but it is surprisingly long! Liu Fei's legs were already swollen and still didn't leave the water.

Suddenly a hurricane blew, and Liu Fei only felt a little unstable in his body. When a huge black shadow flashed, he subconsciously closed his breath.

The black shadow was huge, and when it fell to the ground, no matter how you looked at it, it was a pitch-black lump.

Liu Fei looked more closely, only to find that this guy was also a bat, but the size was very different from those small bats. This bat, which was so black that even the African black uncle was ashamed to stand up, probably reached ten meters, and its size was not much worse than that giant eagle in Wudu.

The black bat landed on a high place, and Liu Fei realized that there was still a layer of space on it. In this crevice, he is a little like a frog at the bottom of a well.

Through observation, Liu Fei determined that this was a fierce beast of the same level as the White Ape Giant Eagle.

As soon as the black bat landed, countless bats flew around it, as if to welcome its return. But the black bat didn't move, just stood there, motionless.

After about an hour, Liu Fei soaked underneath. After waiting for another half an hour, Liu Fei finally couldn't help but climb towards the rock wall!

It's not just the water, it's the foul stench, presumably the excrement of these bats.

This crack is not high, if it weren't for the darkness around here, Liu Fei would naturally be able to see at a glance that the place he was in just now was a crack. And what seems to be a long way is actually Liu Fei himself going around in circles.

Liu Fei, who crawled out of the crack, found these things, and tiptoed in the direction where the black bat was flying.

Although the huge black bats did not move, it did not mean that the tens of thousands of small bats hanging on the rock wall did not move. Once again, an ultrasound wave that made the ears ringing and the head swelled, the huge black bat opened its still dark eyes.

Liu Fei is tall among humans, but he is a small guy compared to the black bat. The moment the black bat saw Liu Fei, it spread its wings and fanned Liu Fei with a pair of meat wings.

Liu Fei knew that he was exposed, and burst out at the fastest speed and rushed towards the entrance of the cave.

He's fast! Black bats are faster. The claws on the meat wings flexibly grabbed Liu Fei's body and grazed Liu Fei's body.

Liu Fei felt a pain in his shoulder, and at a glance, his heart was shocked. A piece of flesh was cut off from his shoulder by the black bat's claws.

Liu Fei dodged and fled behind a boulder, urging the qi in his body to envelop the area, and the blood quickly stopped flowing out. Sprouts are growing out of the flesh, and the wounds are healing quickly.

There was no time to check the injury, Liu Fei rolled forward and jumped dozens of meters. A black claw with a cyan glow gripped at the boulder where he was hiding, and the boulder was sliced open like tofu, leaving several deep claw marks on the ground.

The strength of this black bat was extremely strong, and Liu Fei jumped on top of the rock wall, startling hundreds of bats. These bats are so disgusting that they emit ultrasound waves around him.

Ultrasound was what Liu Fei felt the most uncomfortable, because this thing could actually interrupt his qi. It's not that qi is inferior to ultrasonic, but Liu Fei's control of qi is not satisfactory.

Fortunately, this cave is too small for black bats, and their mobility is limited, otherwise at Liu Fei's speed, he would have been caught and killed by the other party.

But this is not a place to stay for a long time, Liu Fei spat out a mouthful of green mang, which did not shoot at the black bat, but exploded directly in the air and turned into a dazzling firework.

The ability of the 'Mouth Belly Honey Sword' is useless to the Rat King who only has high-level strength, let alone this black bat?

Bats like to be dark, and this green light is like a flashbang in their eyes, blinding their eyes. But bats are creatures that don't eat with their eyes, but with ears and mouths.

However, this still had some effect on these creatures, and Liu Fei ran into a huge passage. His speed is naturally extremely fast, in the blink of an eye! There was a light in front of him, and at this time he had run at least five or six hundred meters.

The cave is really deep! Seeing that the light was in front of him, Liu Fei was overjoyed and greeted the light.

However, the black bat behind it was not a vegetarian, and the sudden light only made it stunned for a moment, and it fanned its huge meat wings and chased after Liu Fei!

How can you run faster than you fly? The black bat reached the top of Liu Fei's head in the blink of an eye, and its huge body pressed down.

Liu Fei reacted, rolled to the side a few times, stood on the steep rock wall, and did not entangle with the black bat, just to escape from this place.

"Ming Ming Ming~"

This voice was not the cry of some creature, but the sound that sounded in Liu Fei's head.

He instantly felt as if his head was getting bigger, and his hands and feet were unsteady and he fell off the rock wall.

The ultrasound emitted by the black bats is more powerful than tens of thousands of small bats, and Liu Fei, who has a splitting headache, has no ability to move.

Liu Fei, who was holding his head in pain, watched as the black bat fell, and his claws grabbed at his body.

The black bat didn't underestimate this little guy, because it could feel the same breath as it from Liu Fei! Liu Fei can see the qi in the bodies of other creatures with his eyes, and the same is true for fierce beasts! However, due to the black bat's eyesight, it can only be judged by its senses.

As soon as he grabbed Liu Fei's body, the black bat shrank back as if it had been electrocuted. It's like a man who blindfolds his eyes and learns that what he wants to touch is a terrible thing.

The sound of the black bat also stopped suddenly, and Liu Fei instantly bounced up from the ground, crossed the last two hundred meters, and escaped from the cave.

But black bats are not afraid of light, they just don't want to stay in the sun. It then caught up as well, this time directly flapping its wings for a hurricane.

Liu Fei's body was blown out by the hurricane, slid on the ground several times, and looked embarrassed when he stood up again.

Now Liu Fei saw the appearance of the black bat, it was indeed pitch black, and at the same time, it was extremely huge. The huge body stretched out completely in the sky, and it was even more shocking than the giant eagle.

The large mouth was open but white fangs and scarlet tongue flesh, and a blue tornado spat out of its mouth. This tornado was like a blue light made into a drill bit, shooting straight at the place where Liu Fei was standing.

Fortunately, Liu Fei has already overcome the predicament of ultrasound, and as soon as Qingguang is cast, the speed is also extremely fast.

The cyan drill bit drilled into the ground, and directly opened a huge hole more than ten meters deep in the ground, which was extremely powerful, and it was no worse than Liu Fei's cyan ball.