According to Shiratori's understanding a few years ago, Sharingan's ability is a special kind of Yin Release. The use of Sharingan requires Yin Release, so it will lead to a reduction in spiritual energy.
Excessive use of the Sharingan will cause a face that looks like it has kidney deficiency. He attributed this side effect to the drastic reduction in Physical strength.
Physical strength, like Chakra, is a 1:1 mixture of physical energy and spiritual energy. If spiritual energy is consumed drastically, physical strength will also be reduced.
Now that he thinks about it… It doesn't seem to be the case because he discovered that the physical energy would also be consumed!
During normal sparring, he had never consumed so much of his spiritual energy, nor had he noticed any abnormality in his physical energy because his physical energy was insanely strong compared to other Uchiha Clan members of the same age; a small reduction would not attract his attention at all.
During the battle with the Kirigakure ninja, Shiratori finally realized that when the Sharingan was open, a trace of physical energy would flow to the head. After using the Genjutsu for the second time, the spiritual energy was almost drained, and the amount of physical energy flowing into the head increased dramatically.
Shiratori thought about it and roughly understood the reason.
The activation of the Sharingan ability does indeed only require spiritual energy, but doing so will cause huge amounts of spiritual energy to wreak havoc in the head.
The users are just mortals; their brains are made of flesh and blood, and they cannot withstand such destruction.
Without the protection and healing of physical energy, without physical energy to balance the spiritual energy, the user's eyes, optic nerves, and even the entire head may be blown apart…
The stronger the ability and the longer the Sharingan is open, the higher the consumption of the user's physical energy.
With a strong physique like Shiratori, he only felt a little dizzy after the battle, but as time went on, he gradually felt an indescribable pain, as if someone was holding a shit-stirring… A wooden stick, stirring it in his brain.
The pain started from the eyeballs and quickly spread to the entire head. It seemed that every nerve was twisted, and his face was throbbing with pain…
After a large amount of body energy was extracted, the pain gradually subsided, and Shiratori had fully recovered.
In this way, Shiratori squatted on the tree, surveyed the surroundings with his eyes, and summarized the gains from the battle. He did not call on others to take over his night watch duty… Because he was worried.
It was not until the sky turned pale that Shibi and Suiten finally returned.
But the news they brought back… It is not very good.
"We didn't find any traces of Choza's team, nor did we find any signs of fighting. They probably didn't get attacked. It's just…"
Shibi's tone was a little heavy: "Takeshi Hyuga's Jōnin team may have been in trouble."
After confirming the safety of the Choza team that was closest to them, Shibi and Suiten headed straight for Takeshi Hyūga's route.
They also did not find any trace of Takeshi Hyuga's team, but found some broken tools and… Blood along the way.
Moreover, the mist that was about to dissipate but still left a trace of Chakra was enough to explain many problems.
They just don't know… Who wins or loses.
"Now, everyone, quickly pack up your belongings and retrieve the supplies that we hid earlier. We will rush to the southeast camp as quickly as possible and will not rest during the journey."
Looking at the somewhat silent Suiten, Shibi could only temporarily take over the duties of the leader and gave orders to everyone in an unquestionable tone.
"Yes!"
...…
Land of Fire, southeast camp.
After repelling Village Hidden in the Mist's third large-scale attack in six days, the camp was in ruins.
The Konoha ninjas were working hard to clear the rubble and urgently repair the defense facilities. The few Medical Ninjas were running around, transferring the wailing wounded to the temporary hospital in the rear after simple treatment.
Temporary command post.
"Torifu-sama, the transport team was supposed to arrive six days ago, but it hasn't arrived yet…"
"Why didn't you tell me such an important thing earlier!"
Torifu slammed the table and broke it. His face, which usually had a simple smile, was now as cold as ice.
The loss of contact with the transport team meant that the Village Hidden in the Mist bastards had successfully bypassed the front lines and were beginning to wreak havoc in the heart of the Land of Fire.
This was a dereliction of duty on his part and that of the entire southeast camp!
"I'm very sorry. I just discovered this…"
The ninja who came to report was trembling all over, with cold sweat dripping down his cheeks, obviously frightened.
Torifu looked at this scene and finally just waved his hand helplessly.
Watching the other party tremblingly leave the tent, Torifu sat in the main seat, picked up the casualty statistics table that fell on the ground, took a look at it, and couldn't help but sigh.
After a long period of peaceful life, the Konoha ninjas have forgotten what war is…
"Clan head… " Huomaru Akimichi, a senior ninja from the Akimichi Clan who was standing next to Torifu, was hesitant to speak.
"Speak."
"… Yes."
Huomaru gritted his teeth: "Obviously, this loss could have been avoided! You had already reported the unusual movements of Village Hidden in the Mist to Hokage half a month ago and applied to send more reconnaissance ninjas to the Land of Water."
"But your request was rejected by Hokage, who also said that provocative and irritating behavior should not be used to undermine the relationship between the two countries. However, Village Hidden in the Mist's spies were so arrogant that they approached the gate of the camp. This is simply…"
"Huomaru!"
Torifu wanted to reprimand him, but he couldn't say anything.
In the end, he could only say helplessly: "Hiruzen is the Hokage after all. He has to consider the overall situation. It's not wrong to be cautious. He… Should have his own considerations."
Speaking of this, Torifu remembered the expedited letter that had just been sent here urgently via Eagle.
After he read through it, he almost cursed Hiruzen Sarutobi's ancestors on the spot!
There will be almost no support… The focus of the village is on the Land of Lightning… The southeast camp has to fend off the invasion of the Village Hidden in the Mist alone…
Fend off your grandma's legs!
You want me to fight a country with one battalion, right?
And they allowed the Village Hidden in the Stones to station troops in the Land of Rice Paddies and ambush the Raikage…
How do you know that the bastards from the Village Hidden in the Stones won't go south and attack the Land of Fire after killing the Raikage?
Why do you believe in what that old man Onoki says? Are you his son?
You said he wouldn't come and invade the Land of Fire? Is he your son?
Thinking of this, Torifu felt a dull pain in the wound under his clothes that was bandaged.
If he had not fought desperately to stop the three of the Seven Ninja Swordsmen of the Mist, including Fuguki Suikazan, the southeast camp would have been breached by now.
It is unrealistic to expect them to defend the southeastern coast of the Land of Fire by themselves unless…
"Torifu-sama!"
A young ninja who looked to be only in his teens walked in hurriedly.
"Shisui? You're back so soon? How's it going?"
"You… Are right!"
Uchiha Shisui couldn't hide the joy on his face and said excitedly: "The Village Hidden in the Mist… Really withdrew their troops!"
"Are you sure?" Torifu stood up.
"Yes, they have already evacuated the Land of Fire and set up camp in the overseas Land of Waves. They have also built semi-permanent facilities, seemingly preparing for our counterattack. They have no intention of sending out large-scale troops again."
Torifu let out a long sigh, and even the corners of his mouth couldn't help but rise.
Thank god, the commander of Village Hidden in the Mist… He is really a smart man!