If a certain aspect is completely suppressed, the consequences will be serious.

There is also a more realistic issue, which is the comparison of physical conditions between the two.

Uchiha Sasuke had gone through a series of battles, including fighting Kabuto Yakushi, the Sandaime Kazekage, and Bruhi's Impure World Form, and finally a mental battle with Orochimaru. He was no longer in the best condition, both physically and mentally.

Uchiha Itachi's situation was not much better. He exerted all his strength in front of Mizuki, used Susanoo and Amaterasu, escaped, and then rushed here without recovering his strength.

On the way, he gave Mizuki's physical clone a Tsukuyomi. Now he is fighting against Uchiha Sasuke. Not to mention the use of Tsukuyomi, the illusion contest is the most mentally exhausting.

He was temporarily at a disadvantage in physical and ninjutsu fighting, and had multiple injuries on his body. Although they were not serious, the blood loss and pain had more or less affected his ability to perform.

What's worse is that Uchiha Itachi's health was not good to begin with, and his incurable bloodline disease had become extremely serious. His physical condition was much worse than before, and he continued to fight powerful enemies when he had little time left.

The physical strength is definitely useless. Now Uchiha Itachi is relying solely on his last bit of willpower to hold on.

Why did Hope tell Kakashi and Tenzo not to fight hard? People who are desperate and struggling are scary, especially this person who is determined to die and is a member of the Uchiha clan who has opened the Mangekyō Sharingan.

At this time, there is no need, Shuimu will definitely go as far as possible.

Although he is not afraid, with so many powerful enemies, the power of the Rinnegan at his side, and the elusive Uchiha Obito, how can Mizuki have the time to cooperate with the Uchiha brothers in performing a family ethics drama?

Just make sure Uchiha Sasuke can open the Mangekyō Sharingan.

"Hey, you slaughtered the whole clan, even my father and mother, and this is the only power you have?"

Uchiha Sasuke looked at Uchiha Itachi who was struggling in vain with disdain. If he continued to fight like this, the possibility of winning would be very high.

"Why don't you use that red giant? If it was only this powerful, you would have died earlier!"

"As you wish!"

A huge red skeleton arm suddenly appeared and punched down, shocking Sasuke so much that he quickly dodged. At the same time, it also blocked the attack. The originally fierce battle suddenly came to a brief pause.

"Is this Susanoo?"

Uchiha Sasuke looked at the red figure in front of him with a stern gaze. Just a half-skeleton and the incomplete strength of waving one arm could bring such a terrifying sense of oppression.

Even though this was Sasuke's first time fighting against such a large beast, he had seen Mizuki, Kakashi, and Tenzou deal with tailed beasts and large summoned beasts.

"Being bigger doesn't necessarily mean you'll win!"

Sasuke's Chidori Blade, which rushed towards Uchiha Itachi again, was brighter, and the condensed sword light was obviously sharper, especially the Kusanagi sword. When it passed through Susanoo's huge body, it always left scars. Although it recovered quickly with the support of Uchiha Itachi, the consequences of the injuries would always be reflected in the consumption of Uchiha Itachi's body.

Just like the battle between buffalo and hyena, the big one with absolute advantage in strength will often be killed by the more agile hyena which attacks the vital parts.

Knowing that something was wrong, Uchiha Itachi quickly increased the power he poured into it. A complete skeleton giant appeared, and the more flexible Susanoo was no longer completely defenseless.

"I underestimated you a little, but how long can you last in such a high-intensity battle?"

Chidori is not a practical ninjutsu that consumes little chakra. It requires a lot of chakra. Even if you only use Chidori Blade and Lightning Release Armor, it is not an advanced ninjutsu that can be maintained for too long.

"The Uchiha clan members basically don't have any outstanding talents in chakra. If nothing unexpected happens, you're almost reaching your limit."

"How good can you be?"

Sasuke fought back relentlessly.

If the characteristics of ninjutsu cannot be fully utilized and it turns into a protracted war and a war of attrition, then it is time to compete in foundation and will.

Both are members of the Uchiha clan and are equally gifted. When Uchiha Itachi does not use his ultimate killer move, the two are actually very close in strength. Uchiha Itachi is a little stronger, but his physical condition is poorer, so he is at a disadvantage.

"You haven't obtained the true power of the Uchiha family's bloodline limit, so you are so sure that you will win."

The huge red skull rose again, and chakra like red lotus flames swirled and coiled on its body. Powerful muscles and armor that greatly enhanced its defense capabilities began to attach to Susanoo.

"Has it gotten stronger again?"

Sasuke, who attacked again, could no longer easily cut through Susanoo's defense, not even with the Kusanagi sword.

Not only that, the Susanoo chakra mist emitted from the body surface, when it touches the skin, the burning pain is unbearable, as if it is going to completely melt the skin.

"How could this be? If Susanoo is so harmful just by contact, then you..."

Uchiha Sasuke asked somewhat incredulously.

"That's why I said that your tolerance is just like this!"

How can Susanoo be such a simple technique?

When using it, you will burn yourself and your whole body will endure pain that ordinary people cannot bear.

Under such great pressure, maintaining Susanoo and fighting against powerful enemies are definitely not that simple.

The most difficult thing to accept is that using Susanoo not only requires a pair of Mangekyō Sharingan, but also consumes the user's vitality.

Susanoo is both the user's guardian god and the god of death that devours the user's life. It's just that Uchiha Sasuke doesn't know this yet.

"For the sake of power, you not only killed your compatriots, but you didn't even care about your own body. You are indeed abnormal and you shouldn't be alive in this world."

"That's why you're so shallow and weak!"

When you are doing it in full force, you don’t feel it, but once you stop, your body becomes cold and sluggish.

Uchiha Sasuke is at this stage.

However, the dangerous aura of Uchiha Itachi's Susanoo continued to increase, and Sasuke's courage was weakened a little.

"What, it's no longer possible? Then it's my turn!"

Susanoo quickly drew out the long sword from behind with his right hand and swung it downward fiercely. A deep gully appeared, causing gravel to splash.

The huge shock wave brought with it powerful fragments. Although the giant sword did not hit him directly, it still knocked Sasuke back. If it weren't for the Lightning Release Armor, he might not have just suffered a minor injury...