There is no very good way for the Heavenly Sword Sect to do so, the sky is already dark, and the saddle horse has been tired for such a long time, and the disciple doesn't want to sleep well, and it is obviously impossible to wait for it.

Discussion comes and goes, only the disciples who are still on duty can be arranged, and the twenty elders of the Ning Dan period also take turns to sit in charge, and they can rest quickly in the first half of the night to nourish their spirits, and if there is any sudden situation in the second half of the night, they will have the energy to deal with it.

Dong Lin didn't say a word from beginning to end, it was good that he had been in contact for a long time, and the other three elders in charge didn't have much respect for Dong Lin's cultivators in the Peiyuan period.

Although it has been repeatedly emphasized that Dong Lin is a master and a benefactor of the Heavenly Sword Sect, in this cultivation realm where strength is respected, it is difficult to get heartfelt respect for the strength that surpasses others.

No matter how evil the rumors are, they are just rumors.

If Dong Lin hadn't heard that Bai Yuan had returned to the Tianling Mountain Range, he was not in Dongping County, and there was no suitable place to stay, so he would not have followed, and went directly to Sister Bai Yuan in Dongping County.

In a few days, I will go to Haitian Pavilion to participate in some alchemy competition, there are many things, Dong Lin feels a headache, and he can only take one step at a time.

Dong Lin slept for half a night, and sure enough, a strange sound wave came, and Dong Lin's soul was disturbed for a while, and he was completely sleepy.

Yu Qingguan is right, these demon bats are really hateful, these sound waves are constantly coming from all directions, directly interfering with the divine soul, Dong Lin's divine soul is strong, and he does not show weakness compared to the ordinary Ning Dan period, but he feels upset.

Ordinary disciples of the Heavenly Sword Sect do not have such a high level of divine consciousness cultivation as Dong Lin, the magic sound came from all directions, and many of them were rolling on the ground, with a terrible headache, so tossing for a night, no one would want to have spirit the next day.

Dong Lin was distraught, and went to the magic circle control hall head-on, and as soon as he entered the door, he found that many of the four elders in charge were inside, and their faces were sinking like water, and when they saw Dong Lin coming in, they nodded at most, and continued to stare at a mirror.

The protective prohibition set up in the quiet valley is still relatively simple, and the main body is a Xuan-level low-grade earth system formation, which is generally used by medium-sized doors, with the help of spiritual veins and earth veins to form an earth spirit barrier, and the defense ability is not bad, and it is not a big problem to deal with the general demon beast group.

And there is a warning ban around,This setting is more comprehensive,The situation in all directions can be timely reflected to the control hall,Three-dimensional in all aspects,With the help of aura, the holographic projection with a sci-fi image is realized,Much clearer and more intuitive than the surveillance camera。

The situation outside can be seen clearly, countless huge bats, flying in the sky, trying to break into the quiet valley, but they are blocked by the earth spirit formation, in addition to the disturbing sonic attack, some fireballs and ice balls smashed on the barrier from time to time, causing ripples.

"Elder Zhou, they're in place!" Tong Hu had a smile on his face, and he saw five Heavenly Sword Sect Ning Dan Stage Elders appear in the image, each of them with a flying sword flash in their hands, turning into a sky of sword light and killing towards the bat group.

Sword cultivation was originally known for its super attack power, and the shots were all sword cultivation in the Ning Dan period, and the sword light in the sky was exchanged for the blood rain in the sky, and countless ice and fire sound bats were torn into pieces by the raging sword light before they had time to dodge.

The entire quiet valley was suddenly cleared, and several elders looked relaxed, but before they could fly back, a more violent sound wave struck, and the five elders in mid-air bore the brunt, their faces turned white, and they were almost shaken down, and even the people on the ground were greatly impacted.

This sound wave was obviously released by the Demon Bat King, and the target was obviously those five Ning Dan Stage Sword Cultivators.

It's a pity that the figure of the Demon Bat King can't be seen in the projection, and the five elders standing in the air don't seem to be able to find a target, so they can only take the little bats that have reappeared around them to vent their anger.

Several large-scale sword light battles in a row forced the demon bats to dare not approach, but the sound waves of the demon bat king also made the five elders very uncomfortable, you must know that once the soul is damaged, the difficulty of repairing it is far greater than that of the physical body, Xu Can is the best example, since the soul was injured, basically the time is spent sleeping and recuperating.

Due to the fact that she rarely shows up, the number of appearances has been greatly reduced, and the position of the female number two has been seriously detained.

The five elders couldn't stand it anymore, so they had to fly back to recuperate, and the demon bats outside were raging again.

Immediately afterwards, five more elders went up to fight, and the results were still remarkable, but the magic sound was still the same, and no one in the quiet valley was at peace.

Elder Wei complained first, "I still want to arrange someone to rest and go down to the valley tomorrow, but it seems that it won't work, and I have to sleep a lot during the day!"

"Well, we have to think of a way to get rid of this nest of demon bats, otherwise the Heavenly Sword Sect won't be able to gain a foothold at all!" Qian Jue also said.

"It's simple!" Tong Hu was furious, "Tomorrow Elder Ben will lead people, and he must eradicate the nest of this group of demon bats! Those bull-nosed old Taoists are really incompetent, and they can't even eradicate the nest of demon bats for so many days!"

"Old boy, pay attention to the virtues of the mouth!" Yuan Li glanced at Dong Lin apologetically, after all, Dong Lin also looked like a Taoist. "Seniors, don't blame, the old boy is a rectum, and he doesn't open the door when he speaks!"

Speaking of which, there has been no explanation, but there is one characteristic of the Taoists here in the Yu Domain, that is, they have a bun on their heads just like in ancient China, and as for other clothes, they are no different from other cultivators.

Dong Lin just watched a lot of costume dramas, and when his hair was long, he tied it with a jade hairpin and made a bun similar to that of a Taoist.

However, Dong Lin has no need to explain, it is not bad to be a Taoist cultivator, and the idiot Taoist recognizes himself as a junior and disciple, and he is always respected, so Dong Lin is even more reluctant to change anything.

Tong Hu also felt that his words were a bit excessive, and he bowed his hand slightly, "Qingzhen Dao Chief, speak quickly in the next moment, I have no intention of insulting you, I hope you don't want to be surprised!" Tong Hu said politely, so he refused to call Dong Lin's seniors, how did Dong Lin think that there was only the Peiyuan period, Tong Hu held himself a monk in the Ning Dan period, and it was impossible to call a junior senior.

Dong Lin smiled slightly, didn't care, and continued to close his eyes to recuperate, in fact, since just now, Dong Lin has been pondering one thing, that is, whether there is any way to restrain this sound wave.

On the side of the Domain, because he couldn't figure out the principle of the spell that was not the five elements of spiritual power, there was no good way to dodge and resist, and he thought that the sound wave was almost indefensible.

Dong Lin is different, the education he received is just a thorough study of natural physical things, this kind of sound wave that disturbs people's minds should be a kind of ultrasound similar to high frequency in Yuyu, or ultra-low frequency infrasound.

To deal with this kind of sound wave, according to Dong Lin's knowledge, there are no more than two kinds, one is to block it with something, which is obviously unrealistic, to build a big cover for Jingyougu, it takes time and effort not to mention, it is not to lock himself up, Dong Lin is not interested in going to prison.

Another way is to find out the intensity, waveform, and frequency of this sound wave, and cancel out this sound wave by calculating the sound wave that emits the same amplitude as the sound wave.

This is just the most basic principle, it is really difficult to realize, the bats flying in the sky are not necessarily just a frequency, the nine sons of the dragon are different, not to mention a large group of demon bats, the magic sounds released are very different, even if they know the principle in the hands of others, it is useless.

By the time you calculate it, it's estimated that these people have already gone crazy.

But for Dong Lin, who has the function of interpreting the Taoist classics, this matter is much easier.

The four elders were at a loss, but Dong Lin suddenly opened his eyes, got up and said with a smile: "Hehe, Poor Dao has come up with a way to resist this sound wave trouble!"