The speed of the two was not slow, and after walking through this for an hour, Xiling Lan lost his sense of direction a little. （）

The chalcedony ring whistle over there never sounded again, and the whistle from Chu Tianmu did not respond, indicating that the distance between them was too far, and most of the caves were curves, not straight roads, so walking through them, neither of them could guarantee whether the direction was correct or wrong. （）

At this moment, Xiling Lan's ears moved again.

"What do you hear?" Chu Tianmu asked.

He now compares Xilinglan's ears to dog ears, as long as her ears move, there is an abnormal sound. （）

"Unsurprisingly, it should be a large wave of bats, a large number of wings vibrating sound, this sound is very disturbing to the chalcedony outpost, we have to go see what is going on......"

In this dark cave, only bats can fly, in fact, it is not the sound of their wings vibrating that interferes with the chalcedony whistle, but because the bats rely on ultrasound waves to identify the direction, it is the ultrasound waves that have a considerable counteract on the chalcedony whistle, there is such a large wave of bats in front of them, and the chalcedony whistle cannot be transmitted too far. （）

If you talk about ultrasound, I am afraid that Chu Tianmu, a pure ancient person, will not understand it, and will not be able to understand it, so he will only say the sound of wings vibrating.

"Let's go, let's see."

Chu Tianmu clenched Xiling Lan's hand, and this time he walked in front.

In this way, after turning two narrow tunnels, the walls of the cave were getting wetter and wetter, and there was mud, how did Xiling Lan feel the same as the situation she had dug through the swamp pool before?

After moving forward for a distance, Xiling Lan urged Chu Tianmu to speed up his pace.

"There seems to be a human voice!" And the situation was terrible, full of screams and sounds for help, which could not be heard clearly, accompanied by the crowding of bats and the sound of crashing.

After passing through several more caves, we finally reached a cave that was relatively open and open.

As soon as they entered, the two of them had already prepared, and they were also stunned by this situation.

Bats, a large number of bats, flying in the air, twitching on the ground, frozen, I can't count how many there are, I just feel that there is a black oppression, and each bat has a little bright red attached to it......

Take a closer look, and Xiling Blue will understand what it is!

That's a leech! Mutant leech swarm!

It's the group that chased her!

Now that the leeches had not returned to the swamp and mud, they had crawled all the way to the wet wall, and it was no wonder that the wall had a slippery feeling.

The group of mutant leeches encountered the bat swarm, so the mutant leech swarm found food, the bat swarm was on the side of being slaughtered, the bat swarm also lived in this darkness for countless years, the antibodies are much stronger than ordinary people, the body is more or less toxin, the bat blood is more poisonous, the mutant leeches sucked their blood, and many of them couldn't stand it, and were turned to the ground by the poison, rolling around.

There are also a few more victims in the crowd of bats, men!

Two of them were bitten by mutated leeches and turned into dried corpses, with a dense layer of brightly colored leeches on their bodies, these leeches were about full of drink, unable to move, and the suction cups were still deeply rooted in the flesh......

The remaining few people are still alive, some have been bitten by leeches, but they have not been sucked to death, they are frantically holding knives, digging leeches from the flesh, trying to dig out the leeches, but these leeches have paralyzing toxins, digging and digging, their hands and feet are not flexible, and once the blood is dug up, it can only attract more leeches to come and bite...... It's also at stake!

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(Education 123 Literature Network)