In a room in an apartment building in the defense zone, Poplar was meditating and pranayama.

Through today's actual combat training, he has a general understanding of the strength of the other three members of the Guardian Squad.

After a few days of intensive cultivation, their strength has indeed improved qualitatively compared to before.

Of course, the poplar itself had also made great progress in his cultivation in the past few days, and the purple sphere in the dantian had more than doubled in size, reaching a diameter of about half a meter.

At the same time, the two black holes inside and outside the dantian have also undergone obvious changes under the continuous polishing of the poplar, one is that the range is larger, and the other is that the suction is stronger, and the effect brought by this is the improvement of cultivation speed and combat ability.

On the other hand, the opening up of brain space seems to be of no other use than to be more sensitive to perception and more agile thinking.

Bai Yang's guess is that the brain space may be the same as the dantian space, there is an invisible barrier or bottleneck, and when it accumulates enough and breaks through that boundary, there will naturally be another world waiting for him.

The more he thought about it, the more Bai Yang felt that this possibility was very high, so he temporarily let go of his obsession with brain space and began to cultivate wholeheartedly.

However, just as Bai Yang was about to concentrate on two things and was about to start the cultivation of the two spaces at the same time, he suddenly felt his consciousness tremble, and then a voice as iconic as a Hong Zhong sounded in the depths of his consciousness.

"Boy, you have a good understanding."

Hearing the familiar voice, Bai Yang was stunned for a moment, and then his heart beat faster in the next moment, his blood pressure soared, and he stammered and lost his temper even when he spoke.

"Old old old guy, you ......"

"Alas, your psychological quality ......" the voice of the Human Ancestor was a little speechless.

Bai Yang also knew that he was too excited just now, and he was a little out of shape in his words, so he hurriedly adjusted and calmed down his emotions.

The ancestor didn't speak again, as if he was watching Bai Yang's every move with interest, waiting for him to take the initiative to answer.

"I'm sorry, Ancestor, if you don't see you for a day, it's like three autumns, since the last time you said goodbye, it's like decades have passed, it's inevitable to be excited to meet again, don't blame Ancestor haha."

"Less poor mouth!" How could the ancestor not know the temperament of the poplar.

"I'm just here to see if your kid has grown in the past ten days."

"I'm afraid it's more than that, Ancestor? You can see what I have grown, so why do you need to come out and check it out for yourself? ”

"Stinky boy, you're excited!" The ancestor was also a little helpless about the poplar.

"But I did show up this time for a reason."

The ancestor paused for a moment, exhaled with a long "um", as if he was suppressing the excitement in his heart, and slowly said what he had been thinking about for several days.

"Your perception of the so-called brain space is completely correct, and your understanding is commendable."

Bai Yang didn't expect that after the ancestor was silent for a long time, what popped out was a rare word of praise.

"But about this brain space, we might as well change the name or the word first."

"What are you called?"

"Tens of thousands of years ago, we called it the eye of heaven, and your medicine now calls it the pineal gland."

"Sky Eye? Pineal gland? ”

Poplar was stunned, he had heard of the latter more than once, but he only regarded it as some kind of anecdote, and did not take it seriously.

Now the ancestor took the initiative to correct the name of the pineal gland, which was originally a specious thing, and once again made a small subversion to the original cognition of the poplar.

"You mean to say that the chaotic space in the brain that I have been opening up recently is actually the pineal gland of modern medicine, that is, the eye of heaven?" Poplar confirmed to the ancestor again.

"Yes." The ancestor was concise and to the point.

"Is the mysterious ability of the pineal gland that is circulating in the outside world real?"

"It's a mixed bag." Old Ancestor replied, "The true function of the pineal gland is far more mysterious and powerful than you know. ”

"Is it stronger than the power of the dantian?"

"The two forces come from different sources, there is no comparison, and each has its own advantages and uses."

"Don't ask yet, wait until I finish telling you in detail."

Before Poplar could continue to the next question, the old ancestor stopped him.

Poplar had no choice but to nod and endure his temperament, waiting for the ancestor to do a systematic "popular science".

"In the human civilization 10,000 years ago, or the human civilization at its peak, there were very few people in the ethnic group who could open the eyes of the sky, far less than the probability of ordinary people awakening the dantian.

What's more, for you modern humans who have long since degenerated, I don't have much hope, so when I told you what benefits purple qi would have for ordinary people, I didn't bother to say anything, but chose to hide it.

As for how many people can open the Heavenly Eye, it will be known when they have cultivated the meditation method.

Originally, I wanted to go with the flow, but now ......"

The Ancestor had to pause for a moment to calm down.

"But now you've given me a big surprise."

"What surprise?" Poplar still couldn't help but interject.

"You kid actually opened the eyes of the sky, hahaha... How is this possible? ”

Speaking of this, the ancestor finally couldn't hold back that breath, and laughed out loud without any scruples.

"I ......" Bai Yang was dumbfounded, and his ears echoed with the unbridled laughter of the old ancestor's naughty boy, and he was really afraid that he would laugh like this.

Perhaps it had been suppressed for too long, the profligate laughter that the ancestor had been laughing for several minutes finally stopped, and Poplar, who was already bored, yawned.

He really didn't expect that the ancestor would still have such an unobtrusive side, and the majestic image of the ancestor in his heart suddenly became much shorter.

"Ahem." Old Ancestor coughed dryly twice, concealed his embarrassment, and returned to his original tone and said casually:

"Do you know why it's called the Eye of the Sky?"

Poplar shook his head.

"That chaotic space is the best gift that this universe has given to human beings, if you can see the whole picture of this space, you will find that the shape of the space is like a human eye, and the clear place in the center is like an eyeball, so it is appropriate to call it the eye of heaven."

Poplar nodded.

"And the greater the degree of opening, the greater the scope of the eyeball, which we also call 'eye-opening'."

"Do you know the reason why the old man is so excited and out of shape?"

Poplar shook his head, then nodded again.

"Is it because I am the only cultivator on earth who can open the eyes of heaven?"

"Huh." Old Ancestor chuckled, as if he was a little disdainful.

"What is this corner of the earth, if nothing else, you should be the only one in the history of human civilization."

"It's... So powerful? Poplar stammered.

"Even Doric, a genius consul at the peak of human civilization, only opened the pseudo-heavenly eye, at that time, he crushed the same batch of competitors with his extremely high cultivation talent and advanced governing philosophy, and became the youngest chief consul in human history, these achievements are inseparable from his pseudo-heavenly eye."

"It's a pity that he was not born in a peaceful era, and in the battle of escape 10,000 years ago, he took the initiative to set himself up as a bait and led most of the soldiers to sacrifice their lives for righteousness, so that the human beings in our earth's vein could survive."

Poplar was a little in a trance, as the chief consul of human civilization at that time, his strength would only be above the current ancestor, but human beings were still like lost dogs, almost extinct.

"Invader, is it so strong?"

"We are not a civilization level at all, and do you think that only among human beings can there be cultivators?" Old Ancestor laughed to himself.

"But if we give humanity more time, no matter how strong the enemy is, why should we be afraid of a war?"

The ancestor's words changed, and his words made people feel a little excited.

Poplar resonates deeply, and his inner sense of identity and mission for human civilization has been strengthened.

"What is the pseudo-heavenly eye?" Poplar asked.

"The pseudo-Tianyan is the original Archon Doric, in order to find a replacement for the Tianyan, using the upper dantian simulation at the center of the eyebrows to open up a space, this method is his first creation, but he is the only one who succeeds."

"The superposition of the ability between the Heavenly Eye or the Pseudo Heavenly Eye and the Dantian is not a simple 1+1, otherwise the old man would not be so excited."

"As for why Tianyan couldn't coexist with the dantian at the same time before you, no one can explain it so far, only wait for you to slowly solve this biggest unsolved mystery in human history later."

"Phew", Poplar habitually exhaled deeply, only to realize that he was in the state of a conscious body, and he didn't need to breathe at all.

It can only be said that the content of the ancestor is indeed shocking and fascinating, making him completely forget about it.

"Then Ancestor, can you tell me about the simplicity of this Heavenly Eye? With all due respect, don't blame you, this Tianyan's help to me now is not as obvious as that of the dantian. ”

"Stinky boy, with a treasure mountain and no one knowing." How could the ancestor not be blamed, and suddenly scolded.

Poplar could only smile, waiting for the ancestor to give him an answer.

"Tianyan, like the dantian, are two cultivation systems in the human body that are equally equal. Cultivators are in the company of the dantian all their lives, and the pioneer and controller of the Heavenly Eye is called the Heavenly Master. ”

"A celestial master who can catch ghosts?" Poplar couldn't help but have such a thought in his heart.

Old Ancestor's voice paused, and he didn't speak for a long time, so frightened that Bai Yang immediately emptied his mind.

According to the research and speculation of the human sages, the realm of the Heavenly Master is the highest or more than tenfold, and the highest achiever of the Heavenly Master in the history of human civilization has only reached the fourfold level.

"The power in the dantian is the power of the dantian, which has essentially been refined into a kind of energy, so it can be used by cultivators; And the power generated by the eye of heaven is a wave, similar to what you call electromagnetic waves, which are a special form of energy. ”

"But the essence of the two waves is not the same, and the energy contained in them is also very different, as for where the energy in the eye of heaven comes from, we still don't know."

"Just like the dantian, we know that it can convert the substance of purple qi into energy, but the energy carried by the waves generated in the eye of the sky seems to be generated out of thin air, which has completely deviated from the law of conservation of energy in the universe, and we have not yet solved the mystery."

"And the waves generated by the Heavenly Eye, because they are related to our thoughts, we named them Nian Waves."

Waves, energy.

Listening to the ancestor's narration, Bai Yang suddenly felt that the path of cultivation was not as mysterious as he imagined, and that its essence could still be explained by some existing scientific concepts.