Zuo Feng maintained a posture of sitting cross-legged, and his fists swung forward violently, and a strong wind came out with his fists. The left wind could even feel the strong wind spread far away, and finally hit the innermost wall of the cave lightly.

'This is the strength of the bone refining period, and it is really powerful. Zuo Feng thought excitedly in his heart, but he didn't know that his physique after refining and expelling impurities was far stronger than that of ordinary powerhouses in the first bone refining stage. At this moment, he was completely immersed in the joy of breaking through his cultivation, and the comfort brought by this kind of power could only be clearly felt when he was there.

As his gaze turned, Zuo Feng once again cast his gaze on the pile of stone chips on the ground, where there were two pairs of iron rings like shackles. Smiling slightly, Zuo Feng had already remembered that this was the "prison lock" that the old man had introduced before.

According to the introduction of Ning Xiao's senior, this "prison lock" is a gadget he refined. Originally, the old man refined this thing for his disciple's cultivation, and he originally only refined a pair of arm guards for his disciple. But then on a whim, the arm guard was slightly changed and made into the appearance of today's "prison lock".

This "prison lock" looks like two pairs of bracelets, but it is much wider and thicker than a normal bracelet, and it is completely the size of an armguard. He once practiced only one pair of arm guards for his apprentice, but the set of "prison locks" in front of him was two pairs, one pair was worn on both hands, and the other pair was worn on both feet.

Although the old man passed on the production method of the "prison lock" to himself, most of the materials in it were unheard of by Zuo Feng.

Zuo Feng was also extremely curious in his heart, wearing such a strange thing to increase his cultivation speed made him feel incredible.

This "prison lock" looks like it is made of ordinary black steel, but it is much darker than the color of black steel. There are also some special patterns on it, and Zuo Feng doesn't know what the meaning of these patterns is in it, or just for decoration.

Reaching out and gently stroking one of the "prison locks", as soon as he touched this prison lock, there was a burst of coolness, which was not just the coolness that ordinary metal could emit. The surface is obviously polished, but after starting it, it can still make Zuo Feng feel a little rough. Unlike the outside, the inside of the prison is smooth and delicate near the skin.

Zuo Feng subconsciously wanted to take it in front of him and take a closer look, but to Zuo Feng's shock, he was not able to pick it up. Zuo Feng couldn't help but feel a burst of surprise, this time he changed his hands to exert force, and almost used up his strength to eat milk, before he barely lifted this prison lock.

Looking at the big bracelet-like guy in front of him blankly, Zuo Feng's first thought was, "The weight of such a "prison lock" exceeded all the weight of the original stone. It's incredible how this can be achieved. Zuo Feng was a little surprised, and subconsciously shook his head.

It's like a person who walks for a long time with a package, but when he opens the package, he finds that he can't even pick up the contents of the package. Such an unbelievable thing, how can Zuo Feng not feel a little surprised.

Gently place the "Prison Lock" against your arm, when Left Wind's arm is fully placed in it. Suddenly, the "prison lock" trembled slightly, accompanied by a slight "click" sound, and the prison lock actually buckled itself together, wrapping Zuo Feng's arm in it.

Zuo Feng was still stunned, and the "prison lock" had already been worn, and then Zuo Feng's face became as ugly as eating a fly. Because at this time, he discovered a sad fact, he didn't know how to take off this "prison lock".

This time the left wind is in a hurry, and the weight of this "prison lock" is six or seven hundred catties at least.

"If you can't take it off, will you have to live with such a strange guy in the future?" Zuo Feng couldn't help but break out in a cold sweat by his guess.

In a panic, Zuo Feng kept trying to fiddle with the prison lock. He didn't know if he had accidentally touched something, or if there was a mechanism on it, and there was a sharp stabbing pain under the palm of his left hand near his wrist.

Compared to the pain that Zuofeng had suffered before, this pain was almost like being bitten by a mosquito. But Zuo Feng hurriedly lowered his head and observed carefully, although he also had an introduction to this "prison lock", he was afraid that there would be some mechanism or poisonous device.

After a little inspection, Zuo Feng found that where the stinging had just occurred, an extremely fine crystal seemed to advance into the palm of his hand. Regarding the sudden appearance of the crystal, Zuo Feng secretly put down the dim sum at first, at least he was sure that this thing should not be poisonous.

Zuo Feng, who was full of doubt, rubbed his other hand vigorously on the palm where the crystal was located, but he couldn't get it off at all.

Just when Zuo Feng was puzzled in his heart, an old voice sounded again in Zuo Feng's mind. Although he had heard the old man's voice before, such a sudden sound still made him feel shocked. After all, the old man hadn't spoken for a long time, and he thought that the messages had been received.

"Xiaoyou, this 'Najing' is what I once was, since you have obtained my inheritance and soul refining, I will also give you this 'Najing' by the way. I don't know if you still have it on you, but if not, I'll tell you what it's for. ”

When Zuo Feng heard the word "Najing", his eyes widened in shock, he had never heard of this "Najing". But listening to the tone of the old man's words just now, this "Najing" is obviously also an extremely wonderful thing.

The old man's voice sounded again: "This 'Najing' was also obtained by accident when I was traveling, and because it is extremely rare, it has never been revealed in front of outsiders. There's some space to store your belongings, which is very convenient to use. As long as you send your telekinesis into it, you will naturally understand that there are some things I left for you in it. ”

Zuo Feng couldn't help but be a little puzzled when he heard this, the effect of this "nanocrystal" was very similar to the storage crystal he had heard of, but listening to the old man say this, it seemed that there was no storage crystal and it was not like a thing. Although this storage crystal is relatively rare on the mainland, there are still some super forces that also have it, but he doesn't know how rare this "nanocrystal" can be.

Although there were some doubts in his heart, Zuo Feng still sent his telekinesis into his palm curiously, and then his consciousness followed closely to a confined space. His consciousness gradually condensed into a phantom in this space, almost exactly the same as him outside his consciousness.

It's not bright, but it's not dim either. After casually visually inspecting it, the space here was almost the same as the big room in the Tiangong Refining Instrument Shop that he had seen. Zuo Feng quickly recovered from the shock, and at the same time understood why the old man said that this "Najing" was extremely rare.

Because this "nanocrystal" is different from the storage crystal that is usually seen now, the "nanocrystal" in his hand is definitely a rare existence from a long time ago. Although he himself has not seen Chu Jing, as far as rumors say, the space inside Chu Jing will definitely not be as huge as this Najing.

Zuo Feng looked at the things piled up not far away, and couldn't help but feel a burst of joy, and his consciousness moved towards the pile of goods. But as soon as he moved, he was immediately blocked back by an invisible barrier, so that the left wind that was caught off guard was also hit lightly.

The body outside of consciousness couldn't help but tremble violently, and then two lines of nosebleeds slowly flowed, and the damage to consciousness was directly reflected on the body.

Zuo Feng in the sea of thoughts subconsciously rubbed his nose, but it did not have the slightest effect on relieving the pain. He shook his head in annoyance, and carefully touched the place he had just hit again, this time Zuo Feng deliberately observed carefully, and there was indeed a transparent barrier in front of him.

When the palm condensed by his consciousness touched the barrier, it also rippled in circles. But no matter how hard Zuo Feng tried, he couldn't break it, so he could only look at the piles of treasures inside and sigh emptyly.

Then an old voice sounded in his head, and at the same time resounded in this strange space.

"The items I have left for you are not precious, but they are all sought after by the world. This barrier I have set up will naturally be easily broken down when your cultivation and mental power reach the requirements, but before that, I believe that taking out the things here will be harmful to you. ”

This old man is really nosy, you said that you gave me this "Najing", and you want to make these strange barriers. This is for the sake of my safety, this is clearly exercising my willpower. Zuo Feng glared at the barrier a little depressedly, and reluctantly glanced at the many goods behind the barrier again, and then reluctantly withdrew his consciousness from this crystal.

The benefits of these "prison locks" Zuo Feng has not yet discovered, but he has already discovered the characteristics that make him depressed. Not daring to study it carefully, Zuo Feng followed the method that the old man said, pasted the Najing on his palm on a "prison lock", and the mental power in his mind moved slightly and collected the "prison lock" in front of him into Najing.

Then he was slightly overjoyed and put the remaining two "prison locks" on the ground into Najing. But then he was depressed to discover the fact that the "prison lock" on his left arm could not be removed, and because his hand could not be bent back, nor could he put it into the near Najing.

"Damn, you're playing with me. Am I going to live with such a heavy guy in the future?" Zuo Feng couldn't bear the depression in his chest, and couldn't help but start scolding.

After venting, Zuo Feng had no choice but to put the small jade box on the ground into Najing. Although Zuo Feng couldn't tell what material this small jade box was made of, seeing that it could store Xuanpin elixir to preserve its medicinal effect, it was definitely not ordinary, and Zuo Feng certainly wouldn't throw it away at will.

After doing this, Zuo Feng glared at the "big bracelet" on his left arm that made him depressed again, and then turned around and walked out of the cave.

[This book was first published from 17k, the first time to see the genuine content!]