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After regaining his senses, Orochimaru smiled and bowed a little to Tsunade, and took the initiative to clarify the matter.

But.

Tsunade obviously would not have thought that the enchanting lady in front of her was actually her long-time friend, Orochimaru. She was too lazy to talk nonsense with them, so she walked away.

"Tsunade-sama, wait for us."

Shizune and Nohara Rin hurriedly chased after her, and of course, when they passed by the Kisame, they did not forget to bow to him.

As soon as the three of them left, Orochimaru's eyes flickered, and he couldn't help but ask curiously:

"Kisame-sama, are you and Slug sage... a couple?"

After asking this question, he thought it was absurd. However, Kisame's answer shocked Orochimaru even more.

"Not yet. But sooner or later, Katsuyu will become my woman."

Kisame's eyes were bright as he announced confidently and domineeringly that it was going to happen in the future. After saying this, he continued to walk forward.

Looking at Kisame's back, Orochimaru was in awe.

Time runs by like a horse.

Three months passed quitely.

During this period, Kisame stayed in the laboratory most of the time. With Orochimaru's help, and with the help of the principle behind the Eight branches jutsu, he developed a similar but more suitable technique for himself.

Orochimaru, after years of research, has mastered the ability of the white snake to regenerate. After that, he used it as a medium to inject it into the Eight branches jutsu, and finally, under the influence of his own obsession, he became a big snake with eight heads and eight tails.

Inspired by Orochimaru, Kisame also began to think about what his "speciality" is.

So far, Kisame has mastered many abilities, and the absorption of various ninja tools alone has brought him more than ten special abilities.

Among these abilities, there are several particularly powerful ones, such as the rebound ability of the Gunbai, the flexibility of the Kusanagi sword, the heaviness of the Senju sword, and the Satori form of the Box of Ultimate Bliss, all of which are comparable to the regeneration ability of the white snake, even more than that.

And not to forget, Kisame has also learned the Sage Mode of the Shikkotsu Forest. It has the ability to absorb natural energy and control the speed of cell division. It can also be used as a medium.

However, Kisame quickly realized that his most powerful ability is not any of the above, but "devour".

This ability was brought to him by the Panda in his mind, and because of it, he was able to reach where he is today and become the Demi-God in the ninja world that no one can defeat.

But recently, Kisame has also discovered that the Panda has not improved him as much as before.

The reason is that the ability of the Panda is only to help Kisame devour all kinds of ninja tools, and there are certain limitations to it.

Kisame realized that even if he devoured Six Paths level ninja tools, he would not necessarily become a Six Paths level powerhouse. After all, those ninja tools were, finally, only created by a powerhouse at the level of the Six Paths level.

Therefore, if Kisame wants to go further, he must find a way to upgrade the Panda.

It must not only help him devour all kinds of ninja tools, but also many other things, and even directly absorb the natural energy of the entire planet like the Shinju tree of the Otsutsuki clan.

Devour, this is the special ability that Kisame chose for himself to step forward.

Now that all the preliminary work has been prepared, the next step is to officially start training and embark on the road of evolution.

Kisame knows that this process is very dangerous and may be full of various accidents, so Kirigakure is not a good place to train.

So, he left Kisame and returned to Shikkotsu forest.

Kisame explained his purpose to the slug sage, and told the latter truthfully that he wanted to abandon this human body and evolve into a higher-level creature.

Hearing this, Katsuyu couldn't help but feel very surprised.

In its view, what Kisame is about to do is crazy and bold, at least in its thousands of years of long life, it has never seen a second person like Kisame.

At the same time, it also has a sincere admiration for Kisame.

After all, he is only fifteen years old this year, and he has already stood at the pinnacle of ninjas. It can be said that he has no opponent in the ninja world, and he is well-deserved as the number one person in the world.

Under such circumstances, Kisame did not settle for the status quo and comfortably be the Mizukage, the Demi-God and the Sage, but took huge risks just to be able to go further.

Even at the expense of the human body.

This kind of fearless spirit deeply shocked and moved Katsuyu.

Therefore, it said to Kisame very solemnly:

"Kisame-sama, no matter what you want, you can tell me, and I will do everything I can to help you."

"I was too embarrassed to speak. Since you said that, then I'm say."

Kisame laughed, revealing two rows of white teeth, and said to Katsuyu, "During my training, I may need to borrow the hot spring of the Shikkotsu Forest. The rich natural energy there may be my chance to success this time."

"Of course there's no problem. Kisame-sama, I'm looking forward to seeing how you evolve."

Without thinking about it, Katsuyu readily agreed.

So, accompanied by Katsuyu's clone, Kisame came to the hot spring once again, and immediately separated ten shadow clones and began to practice.

According to Orochimaru, he took a lot of detours in the process of training the Eight branches jutsu. Because of constantly experimenting and testing on himself, it has inevitably caused irreparable damage and destruction to his body.

Kisame learned from Orochimaru's lesson.

Compared with Orochimaru, his biggest advantage is that he can use his Chakra that is of tail beast level to unscrupulously use multiple shadow clones jutsu.

Through this jutsu, Kisame can continuously create clones, train in various evolutionary directions, and try to change into different forms.

Even if he fails, he will only lose a part of Chakra, and he will get the experience and memory of failure from the clone, make trial and error, sum up and improve.

Until he finds the right way.

On the shore of the hot spring, Kisame's shadow clones were lined up, separated from each other by a certain distance, and thus began to practice.

This is bound to be a long and difficult process.

Three days later.

A shadow clone of suddenly moved.

Under Katsuyu's astonished gaze, the clone quickly swelled, and soon lost its human form, but turned into a big meat ball.

The meatball continued to expand, from three meters, five meters, and finally ten meters in diameter.

'Shhhhhhhh.'

At the same time, many octopus-like tentacles grew out of the surface of the meat ball and danced wildly in the air.

"What is this... so scary, so ugly."

Katsuyu was startled, she shivered and stepped back for a distance. Obviously, she was not mentally prepared for the alien creature that Kisame had evolved into.

'Could it be that Kisame-sama will become like this in the future?'

Just as Katsuyu was making wild guesses, the meatball suddenly let out a painful roar.

"Roar!"

After this roar, it continued to expand, but instead of maintaining a stable spherical shape, after expanding to a limit, it exploded with a "bang".

It turned into pieces of meat in the sky, mixed with blood rain, and fell to the ground.

Failure.

Kisame's first attempt at evolution failed just like that.

Fortunately, this situation has long been expected. Therefore, the other clones continued to practice and were not greatly affected.

And his main body, after absorbing the clone's memory, created a new shadow clone and let it try again.

In the next few months, Kisame has experienced such failures more than a hundred times...

In the process of exploring the path of evolution, he has taken detours one after another, and has entered a dead end hundreds of times.

Once, he evolved into a fat-headed fish. The huge head alone took up three-quarters of the entire body. It was difficult to even turn over when lying on the ground. It can be said to be a failure of failure;

Once, he evolved into a big snake with rough skin and thick flesh and sharp fangs. It looked very powerful, but after a contest with Katsuyu's clone, he was defeated by the latter. In the face of the strangling of the big snake, Katsuyu split into countless small slugs and easily managed to escape. Then her corrosive mucus was sprayed from its mouth, killing the big snake on the spot;

Another time, he evolved into a huge bird man with three pairs of wings, capable of soaring at an altitude of thousands of meters, but it unexpectedly affected by the sun, and exploded on the spot under the scorching of the sun.

…

However, although Kisame has encountered so many failures, in general, as he accumulated more and more experience and lessons, each of his evolutions was better than the last.

It is a process of trial and error and continuous improvement.

And so another two months passed.

After thousands of trials and errors, he evolved into various strange creatures such as meat balls, strange fish, bird man, jellyfish, cow and horse, nine-headed dogs, giant slime, etc., with the rich experience accumulated, and a little Good luck, and finally evolved his ideal perfect creature.

Appearing in front of Kisame, at first glance, it looks like a huge whale, with a mouth like an abyss, as if one bite can swallow everything in the world.

However, unlike ordinary whales, this whale is covered with bone spikes like a jungle, two long horns above its mouth, a huge shark fin on its back, and a tail that is not a whale, but that of a snake.

In addition, there are a pair of broad wings on both sides of the whale's body.

It is not so much a whale as it is a fusion of four animals: a whale, a shark, a dragon and a bird.

"This is... Kun?"

Kisame suddenly discovered that this big guy is very similar to a creature named "Kun" in the myths and legends of the past life in his memory.

There is a fish in ocean, and its name is Kun. The Kun is so big that no one knows how many thousands of miles it is; when it turns into a bird, its name is Peng. No one knows how many thousands of miles it's wings is; when it flies, its wings are like clouds hanging from the sky.

This is a creature that resembles a fish but not a fish and a bird that is not a bird. Its size is thousands of miles, and its wings are like clouds in the sky.

That's right, it's Kun.

Just as Orochimaru's obsession with immortality turned him into an Yamato no Orochi, Kisame's subconscious yearning for power and freedom eventually changed him into a creature like "Kun".

'This is it.'

Kisame's eyes burned bright, and he made a decision without hesitation. The Kun is the ultimate creature he wants to evolve into.

With a "bang", Kisame released the shadow clone, and the clone's memory and experience returned to his body. He stood on the spot to digest and absorb, and after a while, he was ready and couldn't wait to start.

Kisame took off his suit, wore only a pair of shorts, and walked into the hot spring full of natural energy step by step.

Then, he slowly raised his hands, made dozens of seals in total, and finally put them together.

'Boom.'

An extremely huge amount of chakra suddenly poured out of his body and escaped to the surface of the water, setting off a huge water wave.

"Roar!"

Kisame let out a painful roar, and the muscles all over his body bulged, as if something ran out of his body. Immediately afterwards, his skin tore, his body swelled, and in an instant he changed into a Kun.

Compared with the kun transformed from the clone, the kun transformed from Kisame's body is ten times larger and nearly 100 meters long, occupying most of the hot springs.

At this time, Kisame can no longer be described as "tailless beast" or "human-shaped tailed beast", he has become a real tailed beast, and it is the most powerful tailed beast. They have to bow their head in front of him.

But this is not enough.

The Kun in Kisame's heart is a Six Paths level creature that surpasses the three holy land sages.

To grow to that point, the current amount of Chakra is far from enough.

Fortunately, in the form of Kun, he perfectly integrated the panda in his mind with the power of the Shikkotsu Forest's Sage Mode, thus forming an unprecedented powerful ability:

Energy devour.

This ability is very similar to the Shinju tree planted by the Otsutsuki clan. Kisame can unscrupulously devour various forms of energy, and absorb all of it by virtue of its own "sea-inclusive" body of Kun.

As long as the energy is continuous, the growth of Kun will not stop.

Kisame firmly believes that one day, he will become a real Kunpeng, a super creature with a body length of several thousand kilometers that spans the sky over the entire ninja world!

'Now, let's absorb the natural energy in this hot spring.'

Katsuyu once said that the source of the natural energy of the Shikkotsu Forest is the hot spring lake formed by the upwelling seawater after the volcanic eruption on the seabed.

The natural energy in these seawaters is much richer than Mount Myoboku and Ryuchi Cave. If it can be swallowed, Kun's power will undoubtedly undergo a qualitative leap.

It even became a Six Paths level creature in one fell swoop.

Thinking of this, Kisame looked at Katsuyu.

"Katsuyu, although you allowed me to use this hot spring, if I devour all the natural energy in the hot spring, it means that the Shikkotsu Forest will no longer a holy place with abundant natural energy. It will become an ordinary island. Can you accept such a result?"

Kisame did not hide anything from Katsuyu and told it truthfully about his next plan.

If he does this, it will cause a lot of trouble to Katsuyu, so Kisame will choose to give up on this place as there are other parts of the ninja world that can give energy needed for evolution if it really inconvenience her.