Naruto: Legend of the Skylark

Yin Seal.

Hibari had previously wanted to trick his Mito-obaa into teaching him this jutsu. However, considering that the jutsu affects the user's own body and is quite dangerous, Mito didn't teach it to Hibari. Instead, she left the judgment to Tobirama; only when he deemed Hibari worthy would Mito teach it to him.

Just like with the shadow clone earlier, shinobi gradually recover their expended chakra over time. However, this recovery has limits.

Due to physical constitution, age, and other restrictions, while everyone possesses a different amount of chakra, there's always a maximum capacity.

That is, once their body is full of this energy, they won't recover any more chakra.

The Yin Seal itself has no direct offensive power, but it has one incredibly powerful aspect: it creates a sealed space within the body where one can store chakra.

The 'size' of this sealed space also depends on the user's strength; powerful individuals can naturally store vast amounts of chakra. In battle, once this Yin Seal is released, the stored chakra continuously flows back to the user, greatly enhancing their sustained combat ability.

In the future, the one who truly made this jutsu shine was none other than Hibari's beloved little sister, Tsunade, who was currently still causing mischief with Hashirama all day long.

In the future, when little Tsunade grew up, she would be able to combine the immense chakra from the Yin Seal with her Creation Rebirth, allowing her to enter a state of temporary immortality, which was incredibly potent!

So, if Hibari mastered the Yin Seal, he could indeed effectively circumvent the current drawback of the 'Shadow Clone Jutsu'.

For example, in real combat, he could first release this special shadow clone, then quickly release the Yin Seal to rapidly replenish his chakra. This way, he would avoid the weakness of having his chakra completely drained.

"The Yin Seal, huh... This jutsu can't be learned for now, but it's indeed a good solution," Hibari murmured softly.

As his words fell, Hibari looked at the shadow clone again and said, "These things will need to be explored slowly in the future. For now, let's finish the last step..."

The shadow clone nodded upon hearing this and said, "Right, let's do it."

Hibari, in a muddled way, had 'created a copy of himself' through the Shadow Clone Jutsu. While this had great potential, there was one final step that needed verification: could this shadow clone, which they suspected had undergone a certain mutation due to the Human-Human Fruit's ability, actually be dispelled?!

If it could be dispelled, then everything would be fine. If not, it would be a huge problem, and Hibari might have to personally 'kill himself.'

After all, although the shadow clone looked no different from Hibari, there still had to be a primary and secondary. If the ninjutsu could be dispelled, then Hibari would naturally be the primary. If it couldn't be dispelled, although Hibari felt the possibility was low, he was still a little worried about whether this rogue clone might take over. That would be troublesome.

After glancing at the shadow clone, a flicker of determination flashed in Hibari's eyes. He raised two fingers, pressed them together, and softly chanted, "Release!"

As soon as his words fell, there was a soft 'bang!', and the shadow clone that had been sitting in front of Hibari smoothly vanished.

At the same time, a vast surge of chakra instantly replenished Hibari's body, filling him up, which made Hibari smile.

"It seems even if this anomaly genuinely arose from a 'Devil Fruit' ability from another world, it still can't escape the rules of this world. In the end, this is just a very special cloning jutsu," Hibari said with a chuckle, talking to himself.

As soon as his words fell, he felt the painful 'memory' of his shoulder blade being stabbed again, and then he felt a slight, almost imperceptible fatigue.

"This side effect is still there, huh..." Hibari muttered helplessly.

Although this 'Self-Creation Jutsu' had many drawbacks, the underlying benefits were also numerous.

Firstly, if properly prepared in advance, Hibari could become someone capable of a two-on-one fight at any time, and no one could accuse him of cheating. After all, it was his own clone—could they create one too?

Secondly, the special shadow clone could exist for a long time. As long as he didn't dispel the jutsu, and its chakra wasn't used up all at once or it wasn't killed, then it wouldn't disappear.

In this way, Hibari could have it do many things, such as studying together or training together. Wasn't that like consuming a double experience pill?

"However, it's probably best not to easily reveal this anomaly to others, as it's hard to explain..." Hibari murmured softly to himself.

After thinking for a moment, Hibari continued to himself, "Of course, I also really need to find a way to make this uncontrollable into something controllable. If I could genuinely choose when to use the Shadow Clone Jutsu and when to use this 'Self-Creation Jutsu,' that would be truly perfect..."

Thinking this, a gleam flashed in Hibari's eyes, and he thought excitedly, "If I could isolate this cloning jutsu and develop it into a true 'Self-Creation Jutsu,' perhaps that would solve the current drawback? Of course, the ninjutsu name would need to be cooler, like 'Secret Art: Me and I Jutsu' or something..."

In Hibari's mind, although he couldn't directly communicate with the Devil Fruit ability within him, he could generally surmise that the Shadow Clone Jutsu was an unconventional channel that allowed the Devil Fruit's power to seep in and exert its effect.

The reason it was unconventional was that this effect, manifesting through the Shadow Clone Jutsu, brought many troubles. But if Hibari were to specifically create a 'proper pathway' for it, wouldn't that allow the Shadow Clone Jutsu to function freely?

With a dedicated path, he believed the Devil Fruit ability within him wouldn't aggressively interfere with the Shadow Clone Jutsu's path, as it wouldn't benefit either of them. Hibari and it shared a symbiotic relationship, and Hibari was, after all, the master.

"Before, I never thought this Human-Human Fruit could bring me any benefits beyond vitality and chakra energy, so I never really pondered it. But now, it seems my golden finger... might still need development. It's not really that 'abilities can't swim,' but that I need to thoroughly research this ability! At the very least, I need to be able to control this ability!" Hibari said softly.

A Devil Fruit ability, if not properly researched and developed, remains a mere instinct. Take Luffy from the world of One Piece, for example. It took him several years to make his Gum-Gum Fruit ability, which could easily make him 'flaccid,' obey him and be under his control, allowing it to stretch and change as he wished, instead of constantly dragging him down with his face hitting the ground.

Previously, Hibari thought that since he was already human, there was no room for development with the Human-Human Fruit, so he never thought about it, relying entirely on 'instinct.' But now, it seems there might truly be some benefits he hadn't seen behind this.

At this point, Hibari had spent an entire afternoon, from tidying his room to pondering the Shadow Clone Jutsu and finally dealing with all these unexpected issues. The sun was slowly beginning to set.

"Time really flies, doesn't it? Figuring out the Shadow Clone Jutsu took me until now? Let's call it a day..." Hibari said with a smile, looking at the sky.

Just then, he suddenly noticed a small head peeking out from behind the pine tree at the entrance of his courtyard, occasionally looking at him.

And when Hibari looked over, the little head quickly retracted.

Although the little head retreated fast, Hibari recognized the little figure at a glance.

"Tsunade, you little brat, you dare to come back?!" Hibari roared, exasperated, seeing the scene.

His shout directly startled little Tsunade, who was hiding behind the tree, causing her to plop down on the ground.

Seeing this silly and adorable sight, Hibari couldn't help but chuckle. And little Tsunade, upon seeing Hibari's expression, immediately stood up, dusted off her bottom, and scurried towards Hibari with her short legs.

"Hibari-nii, what are you doing?" Little Tsunade ran up to Hibari, hugging his waist, and asked.

"You still have the nerve to ask? Aren't I waiting for you, you little brat, so I can give you a talking-to? Tell me, what bad things did you do today?!" Hibari said, looking at little Tsunade with a stern face.

Little Tsunade, having a guilty conscience, her eyes wandering slightly, then feigned an innocent look and said, "I didn't do anything bad. I was with Hashirama-jiisama all day..."

"It's precisely because you were with Hashirama-jiisan that you had the guts to do bad things! Normally, you wouldn't be this outrageous! Confess honestly!" Hibari said, exasperated.

In the past, although little Tsunade was mischievous, she never had the audacity to take millions of ryo from Hibari. Even when she previously took three hundred ryo from him, she did it openly, entering Hibari's room without any pretense, and Hibari had actually sensed her coming in while he was sleeping, but he simply didn't pay attention.

Unlike this time, where she was directly taught by Hashirama to sneak in and take it while he wasn't home.

Scolded by Hibari, little Tsunade said somewhat aggrieved, "I was just listening to Hokage-sama..."

Before Hibari could get angrier, little Tsunade took out a few banknotes from her small cloth pouch and quickly handed them to Hibari, saying slyly, "I secretly hid these when Hashirama-jiisama wasn't looking, just thinking I'd give them back to you when I came home..."

Hibari glanced at them; altogether, it was less than one hundred thousand ryo, not even enough to buy books for Orochimaru once. But looking at little Tsunade's expression, and recalling her and Hashirama's mischievous behavior, he said with a touch of helplessness, "This time, you're an accomplice, instigated by a 'bad person,' so I'll forgive you. But if you dare to do something like this again in the future, I really will hit you!"

"Then I won't dare to again..." Little Tsunade quickly nodded, saying very seriously.

"Good. In the future, if you really want pocket money, just ask your Hibari-nii directly. Don't do these shameful things again, understood?" Hibari lectured again.

"Understood, Hibari-nii," little Tsunade nodded.

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