The caveman roared angrily at Lin Ye, and at this moment, the weakened cave dragon felt that its back was no longer so uncomfortable, and it tried to stand up, except for the pain of the fire burning in its back. The feeling of weakness and tightness in the chest before is gone!

In the pitch-black tunnel, Lin Ye's black flames blended into the background perfectly, and even Lin Ye's improved night vision could not see the outline. But Lin Ye could clearly feel that after awakening the Vermilion Bird bloodline and obtaining the talent of fire control, the flame feather cloak had completely become a part of Lin Ye's body, like a pair of flexible arms.

As long as they dare to make a move, Lin Ye will give a fierce counterattack.

The cured cave dragon immediately stepped forward a few steps in front of Lin Ye, and at the same time whispered a few times to his companion. The five cave dragons were stunned for a moment, and they were overjoyed to realize that their companions had actually become vigorous again.

They approached, their chirpings trembling, and one of them, a cave-dwelling dragon, whimpered, rushing forward and touching its head with its companion, who was its lifelong mate.

Lin Ye, who originally found that he had been misunderstood and was ready to fight back at any time, also breathed a sigh of relief and lifted the activation of the flame feather cloak.

As the caveman was cured, and the misunderstanding between the two was successfully resolved, the caveman lowered his head and thanked Lin Ye. Among them, Lin Ye's caveman dragon, who had been trying to communicate, whispered to its companion.

It burrowed into the main room, each holding a natural stone on its two thick forelimbs, and a natural stone in its mouth, all of which were placed in front of Lin Ye.

Obviously, in order to repay Lin Ye for saving his life, and also for the guilt in his heart due to misunderstanding Lin Ye, the cave dragon wanted to give Lin Ye the natural stone.

Lin Ye's eyes lit up, and he was about to pounce on it in one step, but he was still a little embarrassed to think about it, he had just done a little work, but he had to take away all the natural stones, which was really unwilling.

After some communication, the cave dragons said that they [have a way to find more natural stones], and Lin Ye immediately changed his greedy bird face and unceremoniously took all three natural stones into his bag.

Since there is still a way to find natural stones, it is easy to say, as the natural stones are collected by the system, each natural stone provides Lin Ye with fifty points, and a total of one hundred and fifty points are obtained, far more than the fifty points of natural breath required to build equipment!

Finding that the natural stone disappeared out of thin air, the cave dragons present were stunned for a moment, and they seemed to be unable to understand it at all. Of course, Lin Ye would not think that the cave dragon could see the mystery of the system, this was something that only belonged to him.

Next, of course, Lin Ye will not let go of the opportunity to get more natural stones!

At Lin Ye's request, a cave dragon took Lin Ye back to the bottom of the lair, and pointed to a passage blocked with gravel on the right with its front paws, as if to tell Lin Ye that they usually went to get the natural stone from that side.

Through the description of the cave dragon, a magnificent scene immediately appeared in Lin Ye's mind. Since the language of the cave dragons is so difficult to understand, I am afraid that even they themselves don't know what to say, and can only express similar emotions, so Lin Ye can only guess the approximate situation.

"Mine ~ Stone ~ Lots ~ Danger ~ Blockage ~"

A group of cavemen dug through a mine, and in the crystalline clusters of mines, there were all kinds of strange ores, including many, many natural stones, and the cavemen took half of them, [using] until there were almost three pieces left. However, due to an unspeakable accident, the passage to the mine can only be sealed.

But if you take the risk, you can still take out a few pieces. Of course, the demand for natural stones in cavemen is not so strong now, and it will have to wait for another two seasons before it will be used again during the breeding season, and by that time, the danger seems to disappear with it.

Whenever he turned his head towards the blocked passage, the caveman seemed to be very vigilant and did not want to wait long. It led Lin Ye to the hole in the storage room and went back to the main room.

Sitting in the storage room, Lin Ye couldn't wait to enter the creation interface. On the table, the bones of two pterosaurs are neatly placed, ready to be built.

"Start building!" Lin Ye shouted in his mind, touching the start button with his mind. Because it was the first time to build, Lin Ye tried to invest a minimum of fifty points of natural breath to test the water first.

Building it!

The two crafting materials begin to merge together, and then the screen blurs with the addition of nature, and a new shiny progress bar appears on the crafting interface.

Because it is a live production, as long as there is a waiting time.

"In the process of starting to build, the estimated completion time of the investment is 5 hours, please be patient, the crafting materials are D-grade, due to the lack of natural breath invested, the props or equipment manufactured will be in the E-level range. ”

How much natural breath do I have?, Lin Ye asked in his mind.

"After verification, the host currently has 129 points of natural breath left, and at the same time, it already has 399 growth points. ”

Under the fluctuation of the transformation totem, Lin Ye gained another four growth points in four days, so he had 399 growth points.

Exiting the interface of the creation system, Lin Ye walked out of the storage room, and suddenly found that there was some sound of sand and stones plucking from the sealed right passage.

Lin Ye's heart immediately rose to his throat, what is this? In this case, he seems to have seen it somewhere, could it be that it is the mysterious creature that he has not seen with his own eyes?

Listening carefully, Lin Ye saw that there was a small hole in the sandstone wall close to the blockage, which was just able for him to pass through. And the hole was constantly throwing sand out, and something was moving inside.

It seems to be a creature about the size of Lin Ye.

After judging this, Lin Ye's courage immediately increased!

"Wow!"

Lin Ye jumped out suddenly, and staggered in front of the creature at the same time. But when he saw the creature's appearance, he was immediately dumbfounded.

It was a fluffy light white mouse, with big snowy eyes and a stubby tail that seemed to absorb all the faint light, and it was popping out of the corner, cautious and careful. The tip of his nose twitched, as if sniffing for the smell. But it was clear that in the dark passage, no matter how wide the mouse's eyes were, it didn't make much difference.

Lin Ye's sudden appearance frightened it enough, and after squeaking rapidly, the mouse lay on the ground on the spot, rolled its eyes, and passed out.

"Hairy rats, mammals, are small, and their diet is generally similar to that of burrowys, and because of their small size, they can remove parasites from the body surface of burrowysaurs. But hairy rats live mainly on the surface. The system is explained in easy-to-understand language.

In the ocean, there is a guide fish that feeds on leftover food from sharks or rays and removes parasites from the shark's mouth, hiding in the shark's or ray's mouth when in danger. Its relationship with sharks is known as a symbiotic phenomenon.

The phenomenon of symbia is when two organisms live together in a way that is beneficial to one and harmless to the other, or beneficial to both and are able to live independently after separation.

The relationship between a hairy mouse and a burrowing dragon is similar to the relationship between a guide fish and a shark.

The Late Cretaceous period was an important period in the evolutionary history of mammals, during which many populations began to diverge to adapt to different small environments.

This seems to be the first mammal that Lin Ye has seen since he became a bird.