Fortunately, this only lasted for about half a minute, and then the nucleus stopped, no longer expanding wildly.

And although Ye Yifan still felt extremely pain, he could already bear it.

After all, Ye Yifan still has a lot of surplus vitality behind him, and the damage to his body will be transferred immediately, the oppressive force caused by the brain nucleus to the brain is actually not as great as imagined, human cells are all elastic, and brain cells are no exception, after experiencing the initial injury, they have been squeezed and formed, and will not cause continuous damage.

"Whew! it's finally over!" Feeling that the brain nucleus on his forehead was no longer growing, Ye Yifan was relieved.

At this time, the brain nucleus has grown to the size of a boxer's fist, which is one size larger than the fist of an ordinary adult, but it is also extremely limited, just like the palm of a person who plays blue ball tends to be larger, but on the whole it will not make much difference.

But even so, the brain nucleus that Ye Yifan made out is more than 10,000 times larger than others, and the length of the needle tip is only two or three millimeters, and the diameter of the brain nucleus on Ye Yifan's forehead is about 8 centimeters, according to the diameter, the volume of the latter is 19,000 times that of the former, plus the difference in density, there is basically a difference of about 100,000 times!

"Continue!" After resting for a while, he felt the pain in his head gradually weakening, and finally after the pain was completely gone, Ye Yifan immediately decided to strike while the iron was hot and began to communicate with the hidden space.

Now that you have successfully created a mind in your mind, the next step is relatively simple.

Ye Yifan stimulated all the internal forces in his body and injected them into the newly formed brain nucleus.

According to the normal situation, Ye Yifan will soon be able to fill the brain core, and by only needing to urge the magic core according to a specific method, he can temporarily communicate with the hidden space, for the martial cultivator who comes into contact with the hidden space for the first time, it is equivalent to opening the hidden space!

Then, with the improvement of strength, the ability to communicate with the hidden space has also been continuously enhanced, and you can even borrow the energy fluctuations near the wormhole to enter the hidden space.

In the hidden space, you can adventure, kill monsters, treasure hunting, and the most common rush. With the help of the hidden space, Wu Xiu was even able to cross the distance of hundreds of light years in reality in one day, and the diameter of the entire galaxy was only 100,000 light years, and he could run from one end to the other in less than a year. If you have a treasure that increases your speed, you can shorten this time a lot. At the same time, those powerful martial cultivators will also increase their forward speed in the hidden space.

But when Ye Yifan drove the internal force in his body to fill the newly formed brain nucleus in his mind, he found that no matter how hard he tried, even if he exhausted the internal force reserves in his body, he only filled a small part, and he was still far from filling this brain nucleus!

"Uh! How can this be? My brain core capacity is so large! What can I do?" Ye Yifan was also confused about this result, but according to the experience he got from Liu Tiezhu and others, he had to fill his mind to do so. But right now, Ye Yifan's brain nucleus is so big that all the internal force reserves in his body can't fill it with one thousandth!

"It seems that you can only use the crystal energy reserves in the castle!" Ye Yifan thought about it, and finally decided to do it in one step, trying to fill up this star core in his mind, so as not to produce any more moths!

In this case, Ye Yifan began to continuously mobilize crystal energy from the castle, ** as internal force, and then quickly sent it into the brain nucleus.

"Whew! The crystal energy consumption rate is so fast, I'm afraid I won't be able to fill this brain core in the end!" After consuming one-third of the crystal energy reserves, Ye Yifan found that the space in the brain core in his mind was only about a quarter filled.

In this way, if the more than 40,000 units of crystal energy in the castle are consumed, it will only be able to fill three-quarters of the space of the brain core, and the remaining part will not be able to fill.

But soon, Ye Yifan found that his worries were completely unnecessary. As more and more energy was channeled into that brain nucleus, the suction generated by it became more and more amazing, and in the end, even enveloping the entire area within a radius of thousands of miles, the energy drawn from the outside world at every moment was an astronomical amount.

At this time, Ye Yifan suddenly found that the internal force in his body was no longer much consumed, and relying on the energy that the brain nucleus absorbed from the outside world alone, he could maintain an increase of one percent of the filling degree every ten minutes or so!

Since this was the case, Ye Yifan was also completely relieved, he glanced at the remaining more than six thousand units of crystal energy in the castle, let out a long sigh of relief, and then began to pay attention to the filling situation in the brain nucleus.

About half an hour later, Ye Yifan suddenly raised his head, only to see that his eyes were shining, just like a lion that had seen its prey.

Subsequently, Ye Yifan began to stimulate this brain nucleus according to a specific method, trying to open the hidden space.

"Buzz!"

Just as Ye Yifan was trying to stimulate the brain nucleus, a magnificent energy fluctuation suddenly appeared, instantly sweeping through the vast space and heading in all directions.

"Click!"

Then, as if something had been broken, a slight crack appeared in front of Ye Yifan.

"Is this the hidden space?" Looking at this crack, Ye Yifan was very curious, according to the experience of Liu Tiezhu and others, when communicating with the hidden space for the first time, he could only drill a small hole at most, connect his brain nucleus to it, and then slowly warm the brain nucleus to make it stronger, so as to establish a more intimate connection with the hidden space.

But now, what appeared in front of Ye Yifan was a crack, although this crack was very subtle, it was much larger than a hole the size of a needle!

"Whew!"

Just when Ye Yifan couldn't figure out the situation, a wave of energy suddenly escaped from that crack.

"It's ...... The power of the hidden star, that's right, it must be it, hahaha, I really communicated with the hidden space, it seems that this time it was sent, and a crack was opened at a time, this crack is bigger than tens of thousands of holes the size of needletips, and a little bit of the power of the hidden star can make me feel a trembling heart, how can I be mistaken?" Feeling this energy, Ye Yifan was determined, the crack in front of him was his brain core, and it was unprecedented to be able to make such a big movement in the hidden space for the first time!

"Fusion!"

Now that the brain nucleus has been used to open the hidden space, the next thing is relatively simple, Ye Yifan tried his best to drive the brain nucleus to establish a connection with the crack, and finally even absorbed it, and the latter directly turned into a long dragon and melted into the brain nucleus.

Other martial cultivators did the same, but the first time they communicated with the hidden space, they could open up a small and incomparably small hole at most, even if they put it into the brain core, it would not be of much use, and it would take a long time to recuperate.

However, the crack that Ye Yifan put into the brain nucleus is far beyond the diameter of the brain nucleus in length, so after being put in, it can only be coiled, it is really like a long dragon, and it is extremely powerful!

"Whew!

As soon as he collected the crack dragon into his brain core, Ye Yifan felt a stream of hidden star power coming out of it, integrating into his brain core, and then radiating again, entering the limbs and hundreds of remains, constantly strengthening his body.

In just a few minutes, Ye Yifan felt that his vitality had increased by 0.1 again, reaching 10.7, which could be described as gratifying.

"The power of the hidden star is really extraordinary! It seems that it won't take me a few days to increase my vitality to more than twenty points, and by then the second-level stellar-level mecha will almost be in hand, it seems that I can also directly refine a second-level stellar mecha, and the increase in strength can even reach twelve times, and then I can be regarded as having the power of self-preservation!" Feeling that his vitality had improved again, Ye Yifan was a little surprised at first, but then he thought of the powerful effect of the power of the hidden star, so he was relieved, and then began to think about the mecha again.

It's just that after connecting the brain nucleus to the saphenous space, it still hasn't ended. At least for Ye Yifan, he felt that the brain nucleus on his forehead was better than that of other martial cultivators, so he could naturally take the opportunity to do something.

For other martial cultivators, after successfully connecting the brain core with the hidden space, it takes a period of time to precipitate, constantly gather the power of the hidden star to strengthen themselves, and at the same time strengthen the brain core, and finally make the brain core reach the size of a grain of rice, and then they can proceed to the next step. At this time, the vitality of the martial cultivator was about 30 points.

In this case, as long as the mind is immersed in the nucleus, you can use it to explore the hidden space, and then create a territory of your own in it. This site is large and small, and some are only as big as a small box, which can store some items, and various protective measures can also be set on the box, which is equivalent to a more private storage space.

Some people take the trouble to build a small house, that is, a building like a thatched house, but they can stay in it, and if they can enter the hidden space**, it will definitely get twice the result with half the effort.

Of course, after entering the hidden space, there will be many restrictions, and it is not possible to stay in it without restrictions, but with the house built by yourself, it will not only be much safer, but also have a bonus to all aspects, such as the time limit for staying in the hidden space will be extended, and you will also get some benefits when you are **.

There are even some big forces that will use the strength of the whole clan to gradually build a village in the hidden space after a long time, so needless to say, at least there is no force in the first-level civilization that can do this. (To be continued.) )