It had been raining all day, and this morning, the rain finally stopped.

Although the clouds in the sky have not yet dispersed, they are not as gray as yesterday, and the hall is much brighter.

After eating something casually for breakfast, Aoyagi sat down at the table by the window, picked up a pen, and wrote and drew in his notebook while recalling the battles he had experienced during this time.

He was summarizing and analyzing his previous performance, preparing to adjust his cultivation plan according to the shortcomings revealed in the battle......

After weighing it several times, Aoyagi felt that the most important thing at the moment was to master the ninjutsu or physical art that could cause powerful damage as soon as possible, with this, he could kill with one hit, or break through the enemy's strong defenses, which was also an important means to reverse the situation.

Second, there is speed. Aoyagi needs a ninjutsu that can be released quickly, preferably Muji ninjutsu. This type of ninjutsu does not need to be sealed, freeing both hands, and can be better combined with physical techniques to unify their own strength.

Combining these two needs, Aoyagi wanted to develop a powerful Muji ninjutsu, and the relevant direction (brain hole) was already there.

Muji ninjutsu, as the name suggests, is a ninjutsu that can be achieved without the need for a seal. Its basic method is ninjutsu that simply mobilizes chakra to make various changes and then achieve various effects.

Of course, if you have a strong chakra control ability, you can theoretically be able to seal with one hand, or even perform ninjutsu without sealing. But this is not Muji ninjutsu.

Muji Ninjutsu, from the beginning of its establishment, has put aside the assistance of handprints, and the pursuit is to quickly launch ninjutsu.

Due to the limitations of control ability, the complexity of chakra changes involved in the development of Muji Ninjutsu may be relatively simple compared to other ninjutsu (there are exceptions, of course), but this does not mean that it is easy to master.

After all, without the assistance of the mudra, it is very difficult to accurately manipulate the chakra in the body.

The most obvious example of Muji ninjutsu is the Spiral Pill, and a series of derivatives.

And this involves chakra changes in two directions, morphological changes and property changes.

If the nature of chakra is simply changed, it is generally necessary to let the palm of the hand carry electricity, fire, and wind, and let the chakra turn into the five categories of earth and water and their corresponding extensions.

Morphological change is not to change the nature of the chakra itself, but to simply change the form of the chakra, so that it becomes turbulent, spirals, and silk threads......

In Aoyagi's view, in addition to the two ideas of form change and nature change, Muji ninjutsu has other directions, that is, to use the various basic properties of chakra to strengthen and highlight it, and then form a new ninjutsu.

Although the number of Muji ninjutsu is very small, and there may not even be existing Muji ninjutsu in every direction that is expected, it is theoretically possible to develop them.

Tsunade's strange power is to use the attributes of chakra impact and repulsion, and strengthen it to an astonishing extent.

Ningci's point points take advantage of the permeability of chakra and the rejection of chakras from different sources......

Chakra also has a variety of other properties, for example, using chakra, can speed up, increase strength, etc., which can be regarded as the improvement of chakra's physical fitness.

On the other hand, it contains chakra that can protect the body to a certain extent, and has a similar cushioning and dispersing effect, but on closer inspection, this property may be composed of two parts. One is based on the chakra's ability to repel impacts. The second is the method of using energy to offset energy, consuming energy attacks that may harm the body, such as electricity, fire, and the like.

For the time being, I will not continue to delve into the basic nature of chakra, but more importantly, develop ninjutsu based on its nature.

In the past, Aoyagi used Chakra's adsorption and repulsion ability to manipulate the air, which can be regarded as a kind of Muji ninjutsu, but it takes too much time to absorb air, and the advantages of Muji ninjutsu are lost, and in addition, the power is also very low.

Although this direction has good development potential, it needs a strong foundation to support, so don't think about it now.

Now, Aoyagi wants to try in another direction.

The existence of chakra lines means that chakras have the nature of materialization.

Materialization also has a very good development potential. To put it simply, using chakra to construct an extremely thin and sharp sword can enhance the ability to break defenses.

After that, there are quite a few advanced directions. For example, changing the shape, such as increasing the change in the nature of the chakra, but unfortunately, I don't have the attributes of fire, wind, and thunder, and I feel that the lethality is weaker, unless it is a high-pressure water jet or something.

There have been previous attempts to materialize the chakra, but they have not been able to grasp the essentials and some problems have not been solved. And now that new chakra manipulation techniques have been obtained, there has been good progress in theory, and success is expected.

I've done it many times in space last night, so let's try it now.

After reviewing the specific steps in his mind, Aoyagi put down the pen with his right hand and laid it flat in front of his eyes.

After a moment of contemplation, the light of chakra lit up on his right hand. The light slowly extended outward, gradually condensing into a blue sword-shaped object.

After holding it for a while, the sword constructed from the chakra shattered.

The build speed is too slow, the stability is also poor, and the sturdiness and sharpness have not been tested, but it is estimated that it is not up to standard.

Next, familiarize yourself with the construction process and increase the construction speed, which can also increase the number of attempts per unit of time and improve efficiency.

Then there is the improvement of stability, well, although the first practice is to increase the speed, but it is also necessary to pay attention to the various factors that may affect the stability and prepare for the subsequent practice.

Aoyagi took out another notebook and began to record the results of this experiment.

Drawing on the solidity of the chakra line and the long-distance chakra release, as well as the chakra operation in the chakra scalpel, Aoyagi directly shaped a chakra sword without relying on seals. It's just that this is still far from his ideal ninjutsu, but he has completed the most troublesome beginning, and then he only needs to spend time practicing and transforming.

Aoyagi then continued to try to construct the chakra sword, recording the specific methods and feelings, as well as the corresponding construction time and stable existence time.

With careful manipulation and timely analysis and lessons learned, the time required for the construction of Aoyagi has been continuously shortened......

By the time the alarm clock sounded, Aoyagi was already able to complete the construction in 4 seconds, which was a lot better than the first 10 seconds.

After pressing the alarm clock, Aoyagi continued to construct two or three times, then got up and stretched.

Okay, now go out for lunch and go buy ingredients for the evening. There are quite a few guests tonight.