"What do we do now?"

"What did you say?"

"I said~ us! Right now! What to do! ”

Their hearing was soon affected. Red Bull and Niulanshan, the two brothers who originally had a good heart, also lost the ability to communicate.

Gu Xuan'er was not damaged at this time, still hiding behind the two people, looking left and right, I don't know what happened to these two people, why they are shouting so much.

"Oh! I see! ”

After watching it for a while, Gu Xuan'er finally understood what was going on. Quickly cast a spell on two people. Only then did the two of them put down the big hand covering their ears and breathed a sigh of relief.

"Gu Xuan'er, why are you okay?"

Although the two of them are fine now, their hearing is still somewhat affected, and their voices are still very loud, as if they are afraid that others will not hear him.

"Oh, be quiet, I can hear you! I don't know how. I guess it's a professional relationship. I have now focused on some energy in your ears, so that it can effectively organize the effect of external sounds on you, but it will not affect your hearing, but only reduce the intensity of some harmful sounds.

The cry just now should have come from the flying mouse, and the situation on Brother Xiaotian's side is definitely not optimistic. Let's go help him, shall we?

You two have me by your side, and you're fine now. Brother Xiaotian may not know how much sin he has suffered at this time! ”

Seeing that the two of them were fine, Gu Xuan'er began to worry about Ning Tian.

"But...... Didn't he tell us to wait here? ”

"Oops. That's not what I just said. Now the situation is different, I agree with Gu Xuan'er's opinion. Let's go! ”

This is the first time the two have disagreed. However, following the voting rules, it is now two to one. Red Bull can only follow the wishes of the two of them.

In order to be able to catch up with Ning Tian quickly, the two of them alternately carried Gu Xuan'er, a 'vulnerable group', and rushed forward in a hurry. They have Gu Xuan'er's assistance, and they are much faster in speed.

"Huh?"

The three of them stopped suddenly, as if sensing something was wrong. But I can't tell what's wrong. Look around and find out what's wrong.

Their vigilance seems to make them particularly sensitive to their surroundings, and they are all three of them at the same time. You can't go wrong.

"Look at that!"

Red Bull pointed to one part of the crater and shouted, Gu Xuan'er and Niulanshan looked in the direction of his finger, and the slope of that place suddenly increased in light. It is getting brighter and brighter, and the surface of the crater is illuminated.

"Could it be that the fire over there is burning closer?"

The three began to speculate to themselves. But before they could come up with a reason, the mystery was revealed.

The edge of the crater is as if the fire outside has couraged the waves. A wave of fire surged from the edge.

These waves of fire are not alone. The same situation occurred in other directions, and waves of fire poured in one after another, and the crater was like a small boat in the middle of the sea, which was about to be overturned by the waves.

"That'...... Isn't that a mouse? ”

Gu Xuan'er's little head looked along the mountain, and when she saw behind her, she finally saw clearly, it was not a fire wave at all, but a swarm of rats. Their fur was set on fire, and they were rushing towards it.

"Do they know we exist?"

"Look at this posture to besiege us?"

Red Bull and Bullpen Mountain also saw clearly. But they don't quite understand. The rats they encountered along the way were all dead, how did these rats know about their existence, and how did they track them down? It would have been if they had chased them along the way they came, but at this time, there were rats in all directions, and they were very puzzled.

"It must have something to do with that flying mouse! It was after it called these burning rats that appeared. Let's go and join Brother Xiaotian! Fast! ”

Seeing those rats rushing towards them desperately, Gu Xuan'er didn't worry about herself, but worried about Ning Tianlai. Now he must still be suffering from the sound of bats, if these rats on fire were really as she said, they were recruited by bats, then Ning Tian's situation would be even more dangerous.

The two of them did not hesitate, took a step and continued to gallop in the direction of Ning Tian. This time, they are not in a hurry, but in a race, playing with their lives. People who have not been hunted down will never be able to understand this feeling. It's like it's hard for a person to imagine that he can jump over a wall more than two meters high, but when a mad dog is chasing him, it becomes easy to climb over that 'insurmountable' wall.

Before, they thought that the number of flames they encountered should be the most they could see! At that time, the flame was really dense.

But when compared to the current situation, it is nothing more than a drop in the bucket.

At this time, the rats really poured into the crater like an ocean. In front of it is a layer of rats whose fur has not yet been ignited at this time. Their mood at this time was much more anxious than Gu Xuan'er and the three of them.

These rats are the closest to the crater. They hadn't noticed the arrival of the group just now, and they were still living their own little lives leisurely. Suddenly, I heard the call of the Rat King.

However, before they could assemble their team to meet the Rat King, the rats that had been caught by the fire on the outer layer rushed over in a hurry. This time, the rush is really not a description.

These intact rats don't care so much, and they start to rush towards the location of the rat king, in this case, only seeing the rat king can make them feel a little more at ease.

There is a summon in front and a life talisman in the back. That's what these rats are really like at this time.

The rats in the back are also the most numerous at the moment. No one knows how many. As if they were infinite, they poured in like a tidal wave from the periphery, and they could not be stopped. On the way, some of the rats died from a long period of burning, but this still did not stop the other rats from advancing, and the dead rats quickly disappeared, not knowing whether they were crushed or eaten by a swarm of locusts.

The originally quiet Crater Valley has now become purgatory. The underground world, which was originally pitch black, is now brightly lit!

The valley was filled with the hissing of rats, and the squeaking sound was extremely rapid, like a reminder of life. Red Bull and Niulanshan were also unprecedentedly fast at this time, leaving the rats far behind.

But in comparison, the situation on the Red Bull side is really good.

At this time, Ning Tian was suffering from unprecedented pain. This kind of pain is even more painful than killing yourself.

The bat was constantly attacking Ning Tian with the sound waves it emitted in the sky above Ning Tian. Ning Tian was only embarrassed now, he never dreamed that his attack would be in exchange for such a response. If he had known, he wouldn't have done it if he had killed him.

Ning Tian opened his mouth wide as soon as he received the attack. When he was a child, he didn't shoot a lot of guns, and when he grew up, he learned that he should open his mouth wide when the voice was too strong, so as to relieve the pressure on his eardrum, so that his hearing would not be injured.

However, this is not the case with the sound waves emitted by bats. This sound is not in the same band at all as ordinary sounds, their amplitude and frequency are completely different.

The amplitude of this sound wave is not that large. If you use the tide to illustrate, the normal sound is like the waves, or the Qiantang tide, the ups and downs are very large. The sound emitted by bats is much smaller, like the surprising ripples of a stone falling on the surface of a lake.

But it's so fast! It's so hair-provoking!

All objects have their own vibration frequency. Just like water, the most stable state is ice. This is when its frequency is the lowest. When the temperature rises, the frequency of its vibrations increases, and when it reaches a certain tipping point, the ice melts into water.

If the heating continues, when the temperature reaches the boiling point, that is, the vibration frequency reaches another point, the water will boil. Boiling is just a critical phenomenon. The end result is that the water turns into water vapor. This state is also the most unstable, and it is easy to re-condense into water droplets.

And then there's the density. The density of water and water vapor can be imagined.

In terms of the level of civilization of the world in which Ning Tian lived at that time, the use of sound waves was not perfect. Diamond is the strongest, and if you can make good use of sound waves, it is really easy to cut diamond.

These are all theoretical. At this time, Ning Tian was suffering from the devastation of reality.

The penetrating power of the sound wave was extremely strong, and Ning Tian had no place to hide at this time. Red Bull they are better away from each other, but their hearing has been affected a little. Ning Tian now felt that the muscles and bones of his whole body were shaking slightly but very violently, and his entire body seemed to be about to disintegrate in the next second.

At this time, Ning Tian's scalp was really numb! It's no longer a feeling, it's a real feeling, because its whole body is vibrating.

Now the scenery in Ning Tian's vision was blurred. It's not the hazy blur, it's the blur that shakes violently. He couldn't see the situation in front of him clearly, so he could only try his best to keep the direction he had just run forward, and he couldn't control the rest.

It is even said that now Ning Tian doesn't even have the ability to think carefully, there is only one thought in his mind at this time: hurry up and stay away from this perverted bat!

He didn't even notice the rat swarm that was coming at this time.

"Ah~~ again!" (To be continued......)