It could be said that if the genjutsu was successfully released, it would depend on how strong the opponent was, how strong the spiritual energy was, and how great the target's resistance to the Kotoamatsukami's command. These three elements were the key to whether the Kotoamatsukami would be successful of not. This was also the reason why Ryoha did not dare to give the command would be resisted hard by Tsunade's heart.
According to the situation, Ryoha had already determined that letting Tsunade remove all of her Wood clones was already the limit. If he raised it a little more, there was a high chance that the Kotoamatsukami would fail, and then the backlash would be very dangerous.
After all, Tsunade was not as simple as an ordinary Kage-level expert. Her willpower and spiritual energy were already extremely strong and pure. Later, after awakening Wood Release and the immortal body, coupled with the two years of cultivation, her spiritual energy became more pure and and powerful.
It was really difficult for him to cast the genjutsu successfully. Even if he succeeded, the duration was extremely short, so this moment was Ryoha's chance. One had to know that the immortal body and Wood Release were incompatible with the Sharingan. It was extremely difficult to cast these techniques on the person with the immortal body, let alone Tsunade, who surpassed all the people who had the immortal body in the past and the Wood Release that surpassed Hashirama's.
"It's over, Tsunade." Ryoha had already seen the light of victory. Her Sharingan combined with Wood Release, Byakugan, and the power of Nine-tails seemed to be stronger. However, Tsunade was also extremely terrifying. Her immortal body and Wood Release had also exceeded the limit. Even the Sage's sons were not as strong as her.
More importantly, Ryoha knew that Tsunade still had a secret Bloodline Limit that surpassed Wood Release. This Bloodline Limit was above Wood Release, and it was also developed using Wood Release as a foundation. Ryoha knew this, but he didn't know if Tsunade had succeeded.
However, the moment the outcome was determined, just as Ryoha's Rasengan was about to send Tsunade flying, a figure appeared beside Tsunade, and the appearance of this figure stunned Ryoha.
"Rasengan." The person's Rasengan and Ryoha's Rasengan directly collided with each other, causing a sky full of dust and rocks. As the power of the two Rasengan was exhausted, the rebound force pushed Ryoha and the person who used the Rasengan to block Ryoha, along with Tsunade, dozens of meters away.
"How is this possible?" Ryoha looked at the person who blocked his Rasengan in surprise and said with a tone of disbelief.
"Are you surprised? To be honest, I am also surprised. I didn't expect that you would force me to use this technique." The person who came was Tsunade. To be precise, there were two Tsunade in front of him. Ryoha was sure that this was definitely not a Wood clone, because all of Tsunade's Wood clone had been removed. However, it was also because of this that Ryoha found it hard to believe.
If Kotoamatsukami failed, Ryoha would have already suffered a backlash. The problem was that it was obvious that the technique was successful. Tsunade also completed the instructions he issued. However, there was another Tsunade here. More importantly, the aura of this Tsunade was actually equal to the one he had just fought with.
"What a strange technique. It can actually control me without me realizing it. I don't feel that it is abnormal at all except for the Wood clone part. And you took advantage of the moment when I removed my Wood clones to attack me. Within that short window of time, you tried to grasp this opportunity to defeat me. What a powerful technique."
"Kotoamatsukami, wasn't it? It can control people unknowingly. However, this technique can only give one command. Moreover, the one you tried to control must have lesser spiritual energy than you. And, the command given shouldn't cause too much resistance in the heart of the controlled person."
"Unless the controlled person's spiritual energy and strength is much lower than the limit of your Sharingan of the End's eye power. In that case, there is still a lot of gap between them and the control range of your Kotoamatsukami. They can be firmly controlled by the eye power of your Sharingan."
"This way, there is no need to worry about the target's resistance. As long as the command of the Kotoamatsukami is not completed, then he will constantly think of all ways to complete it. The jutsu will not be removed until the order is completed.
"However, if this technique is used on me, you must be cautious. Otherwise, it will definitely fail. So you did not give me any harder command. Instead, you chose to instruct me to remove all of her Wood clones. So you can be 100% sure which one is the real me and will not be hit by the clone."
"Your Sharingan of the End is really powerful. Even I was unconsciously controlled by your technique for three seconds. It's a pity that you have hidden so many techniques. I'm not at a disadvantage, I have hidden a lot, but I never thought that you would force me to use this technique.".
Tsunade pointed to Tsunade beside her and spoke about how strong Kotoamatsukami was and how she got hit by that once. After three seconds, she broke through the Kotoamatsukami and regained control. Just like that, she immediately able to told Ryoha everything about the Kotoamatsukami. Sure enough, for strong people, the more powerful a technique was and the harder it was to break it, they could often see through it after just one glance. And she also immediately knew how to deal with it.
On the contrary, some simple jutsus like Wood clones or Water clones would show greater value in high-intensity battles. They were among the most practical jutsus ever made. Of course, the Substitution jutsu was naturally one of the most extremely practical jutsu out there.
Therefore, most of the time, the more powerful a battle was, the more difficult it was to break through. Many powerful techniques would not be used repeatedly to deal with a person. It would only be used in an emergency or to block attacks. For example, Ryoha's Amaterasu just now.
"You saw through it so quickly. That's right, this technique is very powerful, but there are many restrictions. For those who are still far away from the limit of my eye, Kotoamatsukami may even be able to control them for a lifetime until they complete the instructions I gave them."
"Other than having no resistance or suspicion to complete this command, there was no difference in other aspects from normal. It's just that there will be an additional goal that have to be completed in their heart, and that is the effect of the command I gave."
"Of course, there is also an exception. If the command given by me through the Kotoamatsukami has no conflict with the person being controlled and they even wanted to do that task in their heart, then, all the difference in strength, spiritual energy, eye power, and the others could be ignored, and the command would be directly given to the target. Of course, the target would naturally also complete it. Before they completed this task, The Kotoamatsukami will accompany that person forever."
"But for you, regardless of whether you have completed the command I gave you or not, the Kotoamatsukami can only control you for about three seconds. You should have won, but I didn't expect that at the critical moment, something unexpected appeared. Now can you tell me what is going on with the two Tsunades?"
Ryoha explained. In any case, Tsunade had already guessed most of it. There was no difference whether he hid it or not, so he just told her directly. As for the exception that Ryoha said, of course, it was about Itachi. The thing that he wanted to do the most was to protect his brother and Konoha. The instruction to protect Konoha was not only to prepare for his brother, but also for himself.
In order to prevent himself from being controlled to deal with Konoha, with this technique, Itachi definitely would not harm Konoha, because one of the things he wanted to do the most was to protect Konoha.
Then even if he had the Mangekyo Sharingan, and was very strong, he would not resist at all. Instead, he would take the initiative to do it, because this was one of the things he wanted to do the most, so he also used this to break away from the control of Edo Tensei.