Faced with Naruto's immortal mode, Kakashi had no choice but to exert all his strength and directly enter the deeper mode of the Thunder Chakra.

Coupled with the assistance of the Sharingan, Kakashi's use of this ninjutsu has completely surpassed that of the fourth generation of Thunder Shadow.

"If Naruto had already learned the Wind Escape Spiral Shuriken, I'm afraid Kakashi would lose now."

Xu Fan was still secretly observing, analyzing the difference in strength between Kakashi and Naruto.

This actual combat survival exercise has completely deviated from its original direction.

It's no longer a question of whether the seventh class can realize that the real purpose is teamwork.

Once Kakashi loses to Naruto after exerting his full strength, then he, as a shinobi, will lose credibility in this team.

Even if Naruto himself didn't care about this kind of thing, Sasuke and Sakura would look down on Kakashi.

This is not part of Xu Fan's plan.

But the situation in front of him is not very optimistic for Kakashi.

Whether it was him or Naruto, Xu Fan knew a lot about them.

Now Kakashi, undoubtedly, is taking it seriously and going all out to defeat Naruto.

Because of the problem he noticed, Kakashi must know it.

He can't afford to lose this exercise, and he can't afford to lose.

Secondly, the current Naruto only used the immortal mode, and did not use the chakra of the Nine-Tails to enter the golden body mode.

One is full of strength, and the other is at ease.

The situation is naturally not in favor of the former.

"Stand-in."

Xu Fan's eyes were slightly condensed, so he had to forget about the fact that he had come to sign in, and concentrate on the battle between Naruto and Kakashi.

Once Kakashi loses, or even fails, he can only use the stand-in technique to exchange with him.

"Really."

Xu Fan took a deep breath, he didn't expect the situation to develop to this point.

As for Sakura and Sasuke.

After seeing Kakashi and Naruto fight, he was not only shocked by Naruto's strength, but also had a feeling of being shocked by his worldview.

Especially Sasuke.

When he was in ninja school, he was the first in his class in all grades.

Born in such a famous family as the Uchiha clan.

In terms of actual combat, he is undoubtedly much stronger than Sakura, and his understanding of ninjas is far superior to Sakura.

But now......

Sasuke felt that his perception of ninjas had completely collapsed.

Is this a ninja?

Is this ninjutsu?

This is clearly immortal art!

Even though his eyes widened and he tried desperately to capture Kakashi and Naruto, he couldn't keep up with their speed.

The two of them are like a gust of wind, and after they finish fighting in one place, they will immediately move to the other side.

For a while, there was a burst of thunder.

Not to mention rushing up and using Naruto as a bait to seize the bell on Kakashi's body, in such a situation, he couldn't even catch up with them.

Not only that, every time Naruto and Kakashi collided, there would be an impact that spread in all directions.

If you are not careful, you will be swept away, repulsed, or knocked away.

For Kakashi, Sasuke can still understand somewhat, after all, he is the upper shinobi of Konoha Village.

As a shinobi, it is understandable to have such power.

But Naruto, he's always been the tail of the crane in the class!

What kind of place is that place called Mt. Myoki?

Can you train a crane tail like Naruto so badly?

"Damn."

Sasuke clenched his teeth, and the emotions in his heart became more and more unwilling.

Why don't you have such an opportunity, such a power!

If you have this kind of power, you can catch up with that man, and then ask him why he did that in the first place!

"Chakra is passing ......"

Kakashi closed his right eye and observed Naruto with only his left chakra, only to notice that his senjutsu chakra was passing by at a rapid pace.

Although Naruto's strength in this mode is very strong, it is extremely chakra-consuming.

According to his own analysis, in three minutes at most, Naruto would be forced to dismiss the technique due to the lack of chakra.

"That's ...... so"

Kakashi suddenly realized.

There are weaknesses and risks to be taken in any procedure.

Naruto's weakness is battery life.

It's just not clear if Naruto can enter again after this technique is lifted.

"I see."

Kakashi lowered his voice, and his body no longer collided with Naruto, and his steps retreated again and again, blocking Naruto's attacks one by one.

Although he is inferior to Naruto in terms of strength, he is inferior to himself in terms of speed.

"Your jutsu is indeed strong, Naruto, but there are weaknesses."

This feeling was very subtle to Kakashi.

On the surface, this is an analysis in the course of the battle, but in reality, he is talking about it.

"If I'm not mistaken, this technique can't be sustained for a long time because of the extreme consumption of chakra, and in three minutes at most, your body will be forced to disarm this technique."

"I'm not wrong, am I?"

Kakashi asked, rolling his throat.

In fact, Kakashi knew very well in his heart that the lack of battery life was not only a problem with the Immortal Mode, but also his own weakness.

In the state of Thunder Escape Chakra mode is fully open, he uses the Writing Wheel Eye, and in five minutes at most, his chakra is consumed.

"It's Kakashi, you've even found out about this." Naruto was stunned for a moment, then praised Kakashi.

This is also due to Naruto's personality.

At the same time, he did not see Kakashi as an enemy, and in his opinion, it was nothing more than a maneuver.

Even if you tell Kakashi, it doesn't matter.

"Sure enough......"

Kakashi couldn't help but have a lot of complications in his heart, and he couldn't laugh or cry.

This means that Naruto's thinking is relatively simple.

If it were Sasuke, I'm afraid that not only would he not answer so simply, but he would even mislead.

After all, for ninjas, the key to victory or defeat is often a battle of intelligence.

It's like Naruto's jutsu.

Once this is confirmed, there is nothing difficult to deal with.

His Thunder Chakra mode can last for five minutes, and as long as he drags on until Naruto disables the immortal mode, he can catch his flaws.

Suddenly, Kakashi seemed to realize something suddenly.

When he had just trapped Naruto with his mental decapitation technique, he had become very quiet for a while.

I don't know if this has something to do with entering the immortal mode.

"If I'm not mistaken, it will take some time for you to activate this technique, right?" Kakashi asked again.

After getting Naruto's answer, Kakashi focused more on dodging, consuming the opponent's chakra.

And Sasuke and Sakura don't have the strength to intervene in this battle at all.

After a short while, Naruto was exhausted by the immortal chakra and was forced to cancel the immortal mode.

"It's finally here."

Kakashi took a deep breath and threw a hand knife straight away, aiming at Naruto's neck in an attempt to knock him unconscious.