Asuma Sarutobi took out his weapon and wanted to step forward to help, but Drake stopped him.
"This is a matter for their brothers. You shouldn't get involved!"
Asuma wanted to refute, but Kakashi, who had finally stood up, also grabbed him and said, "Leave it to Sasuke! Mr. Drake won't let Sasuke be in danger."
Kakashi was Sasuke's team leader, and since he had said so, Asuma had no choice but to put down his weapon.
Hoshigaki Kisame on Itachi Uchiha's side also didn't move. He respected Itachi Uchiha and also respected his decision, and wouldn't interfere in this brotherly battle.
The ninja sword and kunai collided. Judging from the age difference between the two brothers, Itachi Uchiha should have had the upper hand, but in the end, the two were evenly matched.
Itachi Uchiha was very puzzled as to why his younger brother's strength was stronger than his at this age. But at this time, he had to change his strategy.
Throwing out the kunai that was full of serrations, Itachi Uchiha retreated and sent a large number of shurikens towards Sasuke.
Once, Itachi Uchiha was one of the people in the Uchiha clan who had cultivated the shuriken throwing technique the best. When Sasuke was a child, he often pestered him to practice shuriken techniques with him.
At that time, who would have thought that the two would be like this now.
The sudden memories made Sasuke show a nostalgic expression, but he wouldn't use shuriken techniques to compete with Itachi Uchiha to prove anything.
Sasuke directly inserted the ninja sword into the ground, and a large amount of lightning flashed. And the shurikens that flew over began to shake within a certain area, and all the flight trajectories were messed up, and none of them could get close to Sasuke.
It was another day of science showing its power in the ninja world. Sasuke had figured out the principle of electromagnetism. Although the magnetic field he had set up with Lightning Release wasn't very strong, it was enough to disrupt the flying shurikens.
After dealing with the shurikens, Sasuke pulled out the ninja sword but inserted it back into the scabbard, lowered his body and put on a stance.
That was obviously not the posture of a ninja during battle. The knowledgeable Itachi couldn't help but think of the samurai of the Land of Iron.
Suddenly, everyone heard a strange sound, which was the sound of air passing through a narrow position. Taking a closer look, white air was being sucked into Sasuke's mouth, and that sound was actually the sound of Sasuke's breathing.
As Sasuke breathed, lightning emerged from his body, and what was even more peculiar was that patterns appeared on his face.
Breathing techniques, a cultivation technique from the Demon Slayer world, allowed humans to have the ability to fight demons in that world without extraordinary energy.
When he saw Sasuke practicing swordsmanship, Drake suddenly had an idea. What kind of effect would a ninja with Chakra have if they cultivated breathing techniques?
So Drake taught Sasuke the Thunder Breathing.
The ninja training had accumulated enough experience, and with the effect of the extraordinary energy of Chakra, Sasuke completed the normal cultivation in just a few days and then opened the mark.
Not only was this cultivation speed surprising to Drake, but what was even more unexpected to Drake was that Sasuke's mark didn't have the side effect of eroding life.
Because the natural energy that Sasuke had inhaled during this process had combined with his own Chakra to form a new energy.
Drake later realized that this wasn't the Sage Mode and Sage Chakra!
The so-called Sage Mode was a special form that ninjas entered by combining the external natural energy with their own Chakra in a balanced way to refine Sage Chakra.
In Sage Mode, the ninja's ninjutsu, taijutsu, and other aspects would be enhanced several times, and they would also have extremely strong perception abilities. It was a very powerful skill.
But thinking about it, he knew that such a strong ability naturally had a high threshold for cultivation.
There were two known methods for cultivating Sage Mode. One was to have a Sage Body, which was naturally close to natural energy and had the ability to synthesize Sage Chakra.
The most typical example was the First Hokage. As the reincarnation of Asura's Chakra, Hashirama Senju awakened the Sage Body, which was why he could steadily suppress Madara Uchiha, who had awakened the Sage Eyes only when he was old.
Of course, the fact that Hashirama cells had caused so much trouble later also stemmed from this.
Jūgo, who was under Orochimaru, could also be considered half, although he could automatically synthesize Sage Chakra, he couldn't perfectly control the power of Sage Chakra, and would be eroded and go berserk.
But there were too few people with such talent, and the systematic methods of cultivating Sage Mode were still in the hands of the three great summon beast holy lands.
Among them, what had been revealed was the Sage Mode of Mount Myōboku and Ryūchi Cave.
The two had their own emphasis and their own advantages and disadvantages, but what they had in common was that the steps were to first sense and absorb natural energy, then stably synthesize Sage Chakra, and finally learn the corresponding Sage Techniques.
Mount Myōboku used toad oil to complete the cultivation. It was difficult to enter, but the risk was small. The danger of petrification from absorbing too much natural Chakra could be resolved by externally expelling natural energy.
However, the synthesis of Sage Chakra required high qualifications and the most critical thing was that this process required the practitioner to remain stationary.
In battle, once the Sage Chakra was exhausted, they had to withdraw from Sage Mode, and for this reason, they had to cooperate with the toads of Mount Myōboku to continue fighting.
And the risk of entering Ryūchi Cave was much greater. The White Snake Sage would inject natural energy into the practitioner's body in the form of venom, and only by withstanding the erosion could they complete the training.
Once they failed, their lives would be in danger, and they would eventually become food for the snakes in Ryūchi Cave.
But this was also the most difficult level. After completion, they could obtain the Ryūchi Cave Sage Mode, which could synthesize Sage Chakra even during battle.
Compared to that, the price of the body possibly mutating wasn't much.
In addition to the strengthening of their respective ninjutsu and the acquisition of super-strong perception abilities, the two great holy lands also possessed their own unique Sage Techniques.
For example, the Frog Kata, a special taijutsu of Mount Myōboku, and the Inorganic Reincarnation of Ryūchi Cave, were both quite powerful and practical.
And through the breathing techniques, Sasuke had also obtained an ability similar to Sage Mode.
Drake speculated that the Sage Mode of the two great holy lands was originally a method suitable for toads and snakes to cultivate, so the corresponding physical changes would occur when training with their methods.
Even though Naruto Uzumaki, who was also the reincarnation of Asura's Chakra, had high Sage Technique talent, after he completed his training, in addition to the eye shadow and face paint, his eyes also turned into toad horizontal pupils. Jiraiya's Sage Mode was even too ugly to look at.
And Sasuke's mark mode was more like the First Hokage, and because it was originally a cultivation method for humans, there were no other changes except for the marks on his face.
The most important thing was that as long as Sasuke's own Chakra wasn't exhausted, he could continuously synthesize Sage Chakra through breathing techniques and didn't have to worry about the erosion of natural energy.
As for how powerful it was, wasn't Itachi Uchiha experiencing it?
"Thunder Breathing - Uchiha Style - Sword Thunder!"
A flash of lightning flashed, and everyone present would never forget the splendor of this scene for a long time.
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