Land of Grass, Konoha Camp.
More than three months had passed since the Kushina incident. Since the Nawaki incident last year, it was already early summer of the second year in the blink of an eye.
In this sweltering early summer season, rare moments of leisure on the front lines allowed many shinobi to lazily pass the time in the camp during their shift changes and breaks.
Behind the camp, before a small waterfall, three Uchiha Yorus sat cross-legged in meditation on the water's surface, each holding two black senbon needles in their palms.
Arcs of electricity flickered between the two senbon from time to time.
Meanwhile, the original stood before the waterfall with his right hand extended, his expression solemn as tangible Chakra continuously gathered in his palm.
"Three months now... My arm is sore and swollen, but I'm still just short!"
Uchiha Yoru's face was grave as he gritted his teeth and persisted, his trembling hand held steady.
The Rasengan was an A-rank Ninjutsu. Even knowing the training steps, it was still extraordinarily difficult. It truly deserved its A-rank training difficulty.
Ninjutsu rankings were not determined solely by power. They were based on a combination of training difficulty and power.
"When Naruto learned this technique after the Chunin Exam, he definitely wasn't as good as I am now in terms of Chakra control or theoretical knowledge of Ninjutsu. His greatest advantage was his massive Chakra reserves, and this technique was developed based on the Tailed Beast Ball!"
Information about the technique kept echoing through his mind. Then, Uchiha Yoru seemed to realize something. Inspiration flashed through his mind, and excitement immediately appeared on his face.
"If that's the case, then this technique has another greatest difficulty—the amount of Chakra! Compressing and rotating more Chakra around a single point while maintaining stable output!"
The high-density Chakra spun in his palm. The burns it caused did not concern Uchiha Yoru in the slightest. His eyes were filled only with resolve.
Bang! Bang!
To test his idea, he dispelled the Shadow Clones he had used for training. With all his strength focused, a brilliant blue sphere of Chakra instantly appeared in his palm.
"It... It worked!"
The moment he saw the Chakra sphere in his hand, Uchiha Yoru's face lit up with excitement. Holding up the Rasengan in his palm, he slammed it into a boulder before the waterfall.
In an instant!
Rumble!
The terrifying blue Chakra sphere blasted a deep circular crater into the boulder.
"That brat actually succeeded!"
Tsunade had happened to arrive just then. Seeing this, seeing the brat who had trained like a madman for three months, her eyes widened in shock.
Three months! He had created an A-rank Ninjutsu!
"It worked!"
Uchiha Yoru laughed excitedly before the waterfall, but pain soon appeared on his face as he looked at his throbbing arm.
"Hey, hey, brat, I told you not to push yourself!"
Tsunade's sharp rebuke immediately pulled him back to reality.
When he saw Tsunade, Uchiha Yoru smiled. Rubbing his trembling palm, he said with a laugh,
"Captain Tsunade, I've already placed today's supplies report on your desk."
"Brat, that's not what I'm talking about."
Tsunade snorted irritably. Her high heels stepped across the water's surface, revealing jade-like toes painted with red nail polish as she approached step by step.
"Brat, how many times have I told you about the dangers of training with the Shadow Clone Jutsu?"
Faced with Tsunade's scolding, Uchiha Yoru became an obedient student. He lowered his head and nodded meekly.
"Captain Tsunade, you said that my Cursed Seal Bloodline Limit possesses a special kind of Chakra that strengthens the body, especially its mental recovery. As long as I control the extent of it, training with Shadow Clones won't be dangerous."
"Besides, I've always used Shadow Clones to train Chakra nature transformation. This kind of training only requires intense mental focus, and it consumes the least Chakra, stamina, and mental energy."
Seeing Uchiha Yoru act so obediently gave Tsunade a headache, and she could not help frowning.
This Uchiha brat was truly obedient when he wanted to be. For instance, when it came to organizing supplies records and the like, he was exceptionally capable at handling administrative work.
But when he got stubborn, he would nod obediently no matter what you said, then turn around and do things his own way.
"Brat, hold out your right hand."
Faced with Tsunade's commanding tone, Uchiha Yoru obediently extended his arm. This scene had played out countless times in the camp.
Quite a few shinobi had witnessed it. The contrast was so striking that many Konoha Shinobi privately came to the same conclusion.
Princess Tsunade had really found herself a young pup—and he was an Uchiha!
Sizzle...
The Medical Ninjutsu felt cool against his arm, bringing a soothing sensation. Uchiha Yoru wore an expression of enjoyment, then looked up at Tsunade and said with a sincere smile,
"Thank you, Captain Tsunade."
Many shinobi knew that the Shadow Clone Jutsu could be used for training, but it was unsuitable for most of them.
The mental burden was simply too great. For example, if someone created a clone to train alongside them, after dispelling it, they would need even longer to recover. Overall, it was less efficient than ordinary training.
And once someone overtrained, it could even be life-threatening. As a result, countless shinobi had abandoned this training method. In the Shinobi World today, perhaps only a handful of people, or Jinchuriki, could train this way.
"That Ninjutsu just now was very dangerous! Judging by its destructive power and training difficulty, it can already be classified as an A-rank Ninjutsu."
As she treated Uchiha Yoru's palm, Tsunade glanced at the traces left by the technique and nodded to herself.
Uchiha Yoru smiled and nodded at Tsunade's assessment.
"This technique is powerful, but more importantly, it requires a huge amount of Chakra. An ordinary Chunin can only afford to use it once at most, so training it is practically impossible."
If an ordinary Chunin only had enough Chakra for one use, how much training could their Chakra reserves support?
For example, shinobi with large Chakra reserves might have enough Chakra to train a high-level Ninjutsu ten times, while shinobi with small Chakra reserves could only train once a day.
With the same talent, a shinobi with abundant Chakra could learn it in three months, while one with limited Chakra would need at least ten times as long.
That was why most Chunin simply lacked the ability to train high-level Ninjutsu.
"I'm rather lucky. I awakened two Bloodline Limits at once, and the amount of Chakra in my body far exceeds that of ordinary Uchiha Clan shinobi."
As he said this, Uchiha Yoru smiled. Kekkei Genkai ninja naturally possessed more Chakra than ordinary shinobi.
Especially the Uchiha Clan, whose Chakra reserves far surpassed those of ordinary shinobi.
But after hearing that, Tsunade snorted unhappily and raised a brow.
"Then why don't you mention that Bloodline Disease will make you die earlier than others?"
Tsunade's words left Uchiha Yoru speechless. With you, you big-breasted cow, treating my Bloodline Disease, it'll be completely cured in at most three years or so.
But outwardly, Uchiha Yoru did not dare retort. He could only smile awkwardly.
Seeing this, Tsunade gave a triumphant snort.
"Brat, it's good that you know how to train, but why aren't you practicing the Summoning Jutsu I taught you?"
Uchiha Yoru looked embarrassed after hearing that. Could he say he had no time?
More importantly, he still had to maintain part of his Uchiha persona.
Tsunade seemed to see through that bit of pride in Uchiha Yoru's heart. She raised a brow and mocked him.
"What, brat? Are you afraid people will gossip?"
Just then, amid a disturbance in the distant woods, the voices of two chatting shinobi drifted over.
But their words immediately filled Tsunade with anger.
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