Leaving the country of fire, Zhou Yu began to use the shadow clone to leave the flying thunder magic method in the small country to facilitate contact, Zhou Yu took the soul experimental research within the scope of the country of fire as the first stage, 'free-range rough experiment', the experimental research in the country of fire is indeed very rough and scattered, and it doesn't matter after the soul is fused, only the experimental data after the fusion is recorded, but that is also caused by the environment, and the experimental base cannot be built in the country of fire, of course, there is no need to build an experimental base at the beginning of research, and now his soul research is going to enter the next stage, I also left the Fire Country, and I can build an experimental base in a small country to conduct the next stage of soul energy experimental research.

Naturally, you can't do the construction of the experimental base by yourself, even if you have a shadow clone, Zhou Yu won't let the shadow clone do coolies, it's too cheap, Zhou Yu used illusion to control the small country and the big name, and later Zhou Yu wanted to build a base too much, so he directly requisitioned the prison as his experimental base, and it just so happened that the experimental materials were also available.

Divide the prisoners in the prison into categories and start the experiment, the most reasonable upper limit experiment of soul energy fusion? Soul energy fusion experiment after memory fragments are shattered? How often does it take for Soul Energy Fusion to have a negative reaction? Is there still a negative reaction to a small amount of fused soul energy? As long as Zhou Yu thinks of it, he will separate the prisoner experiment.

Zhou Yuying's clone will occasionally help the small country and the daimyo to govern the country, and one of the traitors will be arrested, Zhou Yu will naturally not be so kind to really help the daimyo govern the country, Zhou Yu is just to supplement the prison number.

There are many experimenters, Zhou Yu can't arrange the sealing enchantment and fuse the soul energy one by one every day, at this time, it depends on everyone's knowledge reserves, Zhou Yu created the soul storage spell based on the flesh sealing technique and the soul sealing technique, and sealed the soul energy in the human body with the nature of the spell seal, the soul energy can be adjusted and fused at any time through the spell seal, and a fixed amount of soul energy is fused every day, and the spell seal can also be closed when it is not needed, which is very convenient.

During the fourth-year holidays, Naruto and Sasuke were all inspired by Zhou Yu to create Spiral Pill and Chidori's follow-up ninjutsu, and sometimes the three of them would get together and talk about their respective gains some time ago, of course, Zhou Yu would not say that he was studying the soul or anything, Zhou Yu would say some of his ninjutsu feelings, and occasionally the three of them would have a discussion.

Teacher Kai also takes Xiao Li to exercise in full swing every day, with the support of Zhou Yu's decoction, he is not afraid that his body can't keep up, what kind of dark injuries do he have, Zhou Yu will also recommend Xiao Li to find Xiao Sakura for treatment, seeing Xiao Sakura, Xiao Li confessed unexpectedly, and was rejected unexpectedly, Xiao Li is worthy of being Xiao Li's hot-blooded boy, he was not hit, but he worked harder, because he was injured more and could see Xiao Sakura more often, and Zhou Yu reserved his opinion after knowing Xiao Li's approach.

The fourth-grade vacation ended soon, Zhou Yu and Jiu Xiaoqiang also entered the fifth grade, and the teaching of Iruka's fifth grade still hasn't changed much in Zhou Yu's opinion, and it still changes back and forth.

Zhou Yu's experiment in the fifth grade continued, and Zhou Yu gradually liked this feeling, little by little to seek knowledge and explore, in the fifth grade, Zhou Yu's soul experimental research, there were joys and losses, but in the end they all fell into trouble, the 'physical' crushing method is really indelible The memory fragments in the soul will always exist in the smashing, and there will eventually be problems if there is more fusion, but there are also gains, at least Zhou Yu's means of playing with the soul are much richer.

Zhou Yu is in the fifth grade, Xiao Li is also in the sixth grade, Zhou Yu is on vacation, Xiao Li has also graduated, there was no accident, Kai still took Xiao Li, Ning Ci, and the third class of Tiantian, Zhou Yu seriously suspected that the so-called class division was probably not too much insider, and the twelve Xiaoqiang classes were the most obvious, and the instructor was either an elite forbearance or an elite forbearance, but Zhou Yu was not dissatisfied because the benefits were all his friends.

When Kai asked about the dreams of the three people, Xiao Li naturally said his heroic declaration, even if he can't use ninjutsu and illusion, he can become a great ninja, and he was ridiculed by Ning Ci unexpectedly, and the following is unexpected, Xiao Li was accepted as a disciple by Kai in advance, and he was supported by Zhou Yu's decoction, but it is no longer simple, Ning Ci was taught by Xiao Li to be a good man.

When Kai accepted Xiao Li, Ning Ci, and Tian Tian, Zhou Yu also went to congratulate, congratulations were secondary, announcing the position of the senior brother was the main thing, Zhou Yu enjoyed Ning Ci unwillingly called out the word senior brother.

The vacation of the fifth grade is still the same as the fourth grade, and Zhou Yu doesn't want to make any trouble when he leaves Zhou Yu in another year, Zhou Yu temporarily stopped soul research in the last year, Zhou Yu started the assembly line of manufacturing research, Zhou Yu found that he didn't have the ability to quickly manufacture his subordinates in batches, how can this work, the future world can't let himself do everything himself, and he also has to have some subordinates, as for cultivating Zhou Yu from scratch, he hasn't thought about it, and it's not about cultivating heirs, so he doesn't need to be so patient to cultivate, Rapid mass manufacturing is what you are pursuing.

In the Hokage world, the most important thing that Zhou Yu thought about in the world of Naruto was the spell seal, which was naturally the concept design of the technique before creating his own technique.

Zhou Yu's design concept in his own spell mark should be the chakra transformation spell mark, chakra can increase strength, speed, and physical strength before it is consumed, which is very suitable for rapid batch manufacturing of cannon fodder subordinates, non-combat time chakra transformation spell mark will automatically plunder spiritual energy, body energy into chakra storage, and it can be released when it is needed, chakra transformation spell mark is equal to automatic chakra extraction, but the chakra of the automatic transformation of the curse mark is much worse than the general lower ninja, middle ninja, and upper ninja in terms of quality and quantity, There is no ninja's control over chakra, and as for why he didn't teach the art of chakra extraction directly, he was naturally afraid that his subordinates would rebel.

After the concept of the curse seal was designed, Zhou Yu began to create his knowledge reserves of ninjutsu cultivation, body sealing technique, and body energy sealing technique.

Chakra Transformation Spell Seal is progressing very smoothly, in the first month, Zhou Yu created his own lower ninja level Chakra Transformation Spell Mark, which is naturally indispensable to the contribution of the prisoners in the experimental base, in the third month, Zhou Yu created the middle ninja level Chakra Transformation Spell Mark, and in the seventh month, Zhou Yu created the upper ninja level Chakra Transformation Spell Mark, and the main reason for consuming so much time is that it takes a lot of time for the Chakra Transformation Spell Mark to extract the lower ninja, middle ninja, and upper ninja level Chakra from ordinary people, Every time I experimented, I had to wait for a long time to know how the chakra transformation effect was, and there was also the problem of the storage of chakra in the ordinary human body, so Zhou Yu was delayed for a lot of time.