The moment they entered the third layer, Xiao Zheng and the others clearly felt a cold aura, which was extremely similar to the kind of cold aura that Xiao Zheng had felt in the ruins of Long Qin before, but the cold aura here was still much worse than at that time, and the cold aura here always made people feel a chill in their hearts, not the kind of cold aura that purely affected the human body.

The students could naturally feel it, although it was impossible to feel this cold aura for the second time like Xiao Zheng, but it was undeniable that the students all subconsciously frowned and looked at the other students, especially the expression on their expressions was the most obvious, and the excitement from the beginning disappeared obviously.

"Use all the internal forces to expel the cold around you, don't be affected by this cold air!" The master said in a deep voice, and his tone couldn't help but be a little serious

The students immediately obeyed the master's order, and Xiao Zheng approached Lin Yunqing and Yin Polang and said, "Have you ever encountered this situation before?"

"What's the situation?" The two of them had just lifted the influence of that cold aura, so they couldn't react to Xiao Zheng's meaning for a while

"It's this cold breath, don't you think this cold air is a little weird?"

"Well, it's true that you say that, I shouldn't have been afraid of these because of the exercises in the family, but these cold qi can still affect me, and it doesn't seem to affect my body, but"

"Spirit!" Lin Yunqing frowned, if it was said that it affected the heart, it was better to say that these cold qi could actually affect the mood of the students to a certain extent.

"That's right!" Xiao Zheng nodded affirmatively, just now Xiao Zheng can definitely be the influence of this cold qi on the spirit, but this cold qi is relatively special, only when you feel the coldness can the spirit be affected, if the body drives the cold qi out of the spirit, it will naturally not be affected

"Be careful in the future, although this is my first time here, I can still feel that this seems to be a little different!"

"Well, Brother Xiao, you too, I'm afraid you will have to be above the two of us in terms of combat power here!" Lin Yunqing nodded, although Lin Yunqing said so, but Lin Yunqing and Huang Zongxi were able to join forces with their masters to kill the cult that went to kill the two of them, which is enough to prove that the strength of the two is not so simple, after all, everyone has hole cards, that's for sure, not to mention that the two are still children of a wealthy family.

"Ahh

A scream sounded, and the students were immediately vigilant, except for Xiao Zhengdu, who was already an old student, he had never seen any battles, and he was quickly ready to deal with emergencies.

"It's a yin worm, it's okay, it's burned to death by internal force!" The one who spoke was a student from the second district of the Ministry of Order, Xiao Zheng was not familiar with this person, he only knew that this person's name was Mu Yi, it seemed that he was a Terran orphan adopted by two demon masters, and his calm personality was very popular with the masters.

"Be careful, this Yin Worm will not cause any harm to your body if it is supported by internal force, but you all pay attention, there are already Yin Worms in this layer!" The master said lightly, but it was a pity that the Yin Worm had been burned to ashes by Murong Xue's internal force

Murong Xue, who was taken aback by the Yin Insect, was a little embarrassed, but after all, Murong Xue was also here for the first time, and she was still a girl, so everyone didn't mind too much, but they were more vigilant in their hearts, and no one saw this Yin Insect just now.

Walking forward again, the master suddenly stopped and squatted down, and the students also stopped, although they were curious, they did not meet them, if there was any situation, the master would naturally tell everyone

"Let's go!" There was nothing unusual about the master standing up, but Xiao Zheng still saw the master's slightly frowning brows, and when they passed by, the students all looked at the place where the master was squatting just now, and what the master saw just now was a corpse of an insect that only the upper part was left

"This is the Yin Worm, it looks like a beetle, but it's a little bigger!" Huang Zongxi explained in a low voice, his tone was a little unconcerned, but it was normal not to care, this kind of insect can bully and bully inexperienced people who come for the first time, as long as it is an experienced person, as long as the internal force is used to protect this insect, it is impossible to even get close

Five of the nine grandmaster students have not seen it, only Huang Zongxi, Lin Yunqing, Mu Yi of the Order Department, and the grandmaster students on the other side who don't know Xiao Zheng's name know, of course, the half-cut corpse of the Yin worm is not the point, the point is that there is something to eat this Yin worm, and if you feed on it, you are not afraid of the cold qi and poison of the Yin worm itself

The third layer is much bigger than the students imagined, and it may also exceed the master's imagination, along the way, the students turned left and right for a long time, and finally got the first harvest, an extreme yin grass!

There is not much difference between the effect of this kind of thing and the extreme yang flower, both of which are used to calm the mind and calm the qi, and the effect of taking it directly and refining it into pills is almost the same, the only difference is that the thing of the extreme yin grass is to calm the mind with coldness, while the extreme yang flower is to calm the mind with warmth, and the effect of the two on the internal strength and combat skills of the practice is also different.

Of course, there are also differences between the two, the extreme yang flower needs a proper environment and enough time to grow, and the extreme yin grass can grow as long as there is enough yin and cold air, and the longer it grows, the greater the effect, it stands to reason that the extreme yin grass can be cultivated in large quantities, but it is a pity that the masters have no way to cultivate it at all, and even when the imperial physician of the Great Song Dynasty, Dr. Li began to experiment with the medicine field from Xiao Zheng, the masters also tried, but unfortunately it still failed.

In short, the effects of the Extreme Yin Grass and the Extreme Yang Flower are similar, they are also rare, if it is harvested, the Extreme Yin Grass in front of me who doesn't know how long it has been growing must be a huge harvest, at least the refining pills must be the best

The appearance of the Extreme Yin Grass made Xiao Zheng know the value of the Yin Acupoint, after all, the Extreme Yin Grass only appeared in the third and fifth layers where the Yin and Cold Qi was weak, and the fourth layer was at most, and further down, because the Yin and Cold Qi was too serious, it could no longer grow, but just such a single Extreme Yin Grass could refine enough for more than a dozen superb pills

Until I found the entrance to the third layer to the fourth layer, I had harvested three pole yin grasses, and encountered more than a dozen of the pole yin grasses that had just grown, and the extreme yin grass was also something that the pangolins in the yin cave liked, but the year and effect of the pangolins were higher, otherwise it would not be possible to have only a dozen of them, of course, it was not surprising that the students also encountered several pangolins, and these pangolins were the common natural enemies of the yin snakes of the yin insects.

Although the pangolin has degenerated, but as a normal beast, the pangolin has it from beginning to end in the yin cave, and the further down these degenerate pangolins, the stronger they are, this is still the case that these pangolins have not mutated, the only thing that disappoints the students is that the pangolin does not have the effect of detoxification and removal of cold poison and yin poison, which has been studied by the masters of the academy in the past, and the degenerated pangolin also has an evolutionary place, that is, it is completely immune to severe poisons such as yin and cold.

Of course, although the pangolin does not have a direct effect, but the indirect effect is still there, that is, insist on eating meat, insist on eating the meat of the pangolin for a period of time can produce some resistance to poison, but unfortunately this effect is very small, if you want to reach the level of restraining yin poison and cold poison, you have to eat at least ten years, and the meat of the pangolin is sour and astringent

The students who entered the fourth layer had to strengthen the operation of their internal force again, because the cold qi was a little stronger, of course, it was just a little, and there was no obvious consumption of the students at the grandmaster level, and even the internal force of the students could increase a little while the internal force was running.

The fourth layer can be said to be full of surprises for the students, as soon as they go down, there are two Extreme Yin Grass that can already be used by the Master to refine pills, and the surrounding Extreme Yin Grass that has not yet grown up has gradually increased, and the most important thing is that there is a second useful herb in the Yin Cave, Yin Yin Grass.

The main function of the Yin Herb is to regulate the instability of refining pills, which can increase the success rate of refining medicine, which is not very useful for students and others, but this is an extremely useful thing for alchemists or doctors, and even allows the best pills with a very small probability to be successfully refined because of this, its preciousness can be imagined, that is, Xiao Zheng instantly moved his mind, although Xiao Zheng does not refine pills, but Xiao Zheng really needs it, Luo Yan Luo Mi said that the success rate of the Pills refined for Ye Xiaoqing is not high

Yin grass is one of the main food of the yin snake, because of the particularity of the environment, there are very few living things, and the yin snake can only eat these yin grass in addition to eating yin insects, of course, this yin grass must have a great effect on the yin snake itself

Guarding the entrance of the third and fourth floors of the cave is a yin snake with a thigh thickness and a length of four meters, which is already an extremely difficult yin snake among the yin snakes, and even the master does not want to risk it because of this, after all, the poisonous mist and cold qi spewed out by such a large yin snake are very powerful and ranged, and even there is no way to avoid it, but there is no way to stop this yin snake in the way that the students must pass, and it is not okay not to deal with it.

Fortunately, it is at the entrance of the cave, the students go up first for the time being, leaving only one master to solve, so that the master has no worries, although the poisonous fog of the Yin Snake covers a wide area, but for the Master this is nothing, only need to protect those poisons with demonic power to easily isolate it, and then just one move will beat the entire body of the Yin Snake into scum, and fortunately, these Extreme Yin Grass and this Yin Grass are immune to the poisonous fog and cold qi of the Yin Snake, otherwise it would be a pity to waste so much, Fortunately, the master was decisive enough and did not cause any losses

Because there was still a large amount of cold qi in the poisonous mist, the students had to wait on it for a while, if one of the students could use internal force to avoid it, but the consumption of the internal force caused by the three mixed together was not as simple as one plus one plus one equaling three

After a full half an hour, the mixture of these poisonous mist and cold qi finally dissipated, and the students successfully descended to the fourth layer! (To be continued......)