The man was Uchiha Itachi, what he remembered the last time was his Edo Tensei's body which was slowly breaking apart when he parted with his younger brother, Sasuke.

But somehow he now woke up in an unknown place, at first he thought that he was resurrected with Edo Tensei, but he realized that he had a human body.

After watching his surroundings and making sure it was safe, he slowly got up and walked to the sh.o.r.e. When a small wave swept towards his feet, at that very moment he saw the reflection of his face, he realized that his Mangekyo Sharingan was active, even he could not deactivate it, but strangely he did not experience a reduction in Chakra or pain in his eyes.

After checking the state of his body, Itachi realized that the Chakra in his body was almost completely lost, and not only was lost, but also the Chakra Pond was very small and could not be expanded anymore, it meant Itachi could not use his Jutsu anymore except basic Jutsu like Buns.h.i.+n, Henge, Kawarimi or Jutsu below. But strangely the Mangekyō Sharingan does not consume Chakra in his body.

Not far from the beach, Itachi saw a medium sized fish, he wanted to try whether his Mangekyo Sharingan could still be used as usual.

[Amaterasu !!]

Suddenly the black fire enveloped the fish that were in the water, the fire did not even go out and weaken even in the water. When Itachi used his Amaterasu, the stamina in his body immediately decreased drastically, perhaps spending 35% of his stamina. He now knows that his Mangekyō Sharingan does not use Chakra, but stamina. Even so he has to do a lot of trials in the future.

Itachi also realized that he was also younger, maybe around 17-18 years, he still did not realize that he was in a different world. Itachi thinks that he was revived in another country. Then Itachi went to the center of the island hoping to find a village or village, because at this time he was in dire need of information and also clothing because at this time he was not wearing any clothes.

But half a day touring the island, Itachi realized that there was not a single person on this island, all he met was a beast that was Abnormal because it had a very large size.

Right in the center of the island, Itachi saw a very large tree and under the big tree was seen a large tiger as high as 15 meters who was lying lazily. When Itachi saw the big tiger, suddenly his stomach rang with hunger, then Itachi looked back at the big tiger, Itachi's eyes seemed to say 'Looks like dinner has been found'.

Itachi stood on a tree not far from the tiger, after making sure the surroundings were safe, Itachi looked at the large tiger.

[Amaterasu !!]

Suddenly black flames appeared and covered the entire head of the big tiger.

"Roaarrrrr !!!"

The big tiger immediately went berserk and roared loudly as if it reflected tremendous pain. The tiger banged its head against a large tree nearby and tried to extinguish the black fire, but the black fire did not go out and continued to cling to the head of the large tiger as if it were part of its head.

The loud tiger roar attracted the attention of the other monsters on the island, and sure enough before long many monsters peering from afar watched the large tiger being tortured because it was burned alive.

Itachi also realized that the situation was not good, but he immediately felt relieved because it seemed that other monsters did not dare to approach. Itachi did not know that the large tiger he had burned was the ruler of the island.

A few minutes pa.s.sed and finally the big tiger was dead, the black fire still burned the remnants of the tiger's head. Itachi noticed that other monsters still did not dare to approach even though the huge tiger was dead which was most likely to be afraid of its Amaterasu.

Under the gaze of many monsters, Itachi walked closer to the corpse of the huge tiger and then removed his Amaterasu. Itachi then looked at the monsters around him, immediately the monsters immediately fled quickly and were afraid to be the next target.

Itachi then compacted the Chakra at both ends of his right finger, then a scalpel made of Chakra was formed. With Itachi's extremely high intelligence, it was easy for him to make things like this even with his small chakra reserves, after cutting it into pieces, Itachi was ready to bake it.

A few hours had pa.s.sed, Itachi was very surprised because he could finish all that big tiger meat, he realized that most of the nutrients and energy produced from the meat flowed toward his eyes. From his a.n.a.lysis, his eyes have their own personal s.p.a.ce that serves to store energy for him to use when using the power of his eyes.

Eating a lot of meat is the same as having a large energy storage. Although it sounds simple, but for Itachi this is a troublesome thing, he doesn't want to spend a lot of time just to eat, so he must immediately find another solution.

It was getting dark, Itachi who had been wearing tiger skin clothing was now looking for a safe place to rest. Itachi saw a hole that was not too big in the middle of a large tree where the tiger had previously rested, then Itachi entered the hole in the tree.

Itachi then looked around the hole that looked like a small cave, with his Sharingan always active, Itachi immediately realized that this small cave was a man-made view of the many sculptures around the cave, and maybe this place was a secret meeting place or place to hide something. And sure enough, Itachi found a small iron door hidden one meter inside the cave floor.

Itachi dug into the place then he found the small door that could only be entered by one person at the same time. Itachi opened the rusty iron door, what he saw next was a hole and a ladder that went down, Itachi immediately went down the stairs because he did not feel life or traps in the depth of the hole.

The hole was deep enough and it took several minutes for Itachi to get to the bottom of the hole. After reaching the bottom of the hole, Itachi saw a fairly large room, even though the place was very dark, with the Mangekyo Sharingan he could see the surroundings as clearly as daylight.

What Itachi saw in the room was a pile of gold, thick books and a pile of paper which according to Itachi was the currency in this country. Not far from the pile of treasure, Itachi saw a corpse that was left with only bones, the corpse resting on a strange stone cube that had inscriptions that he could not read.

Itachi looked at the books and began to read them, the longer he read the more surprised he was. Because all the knowledge from these books had never been known by Itachi in his life.

The world government, Tenryubito, kingdoms, pirates, mermaids, Devil Fruit and many other things that are not known to him. Itachi now realized that he did not return to the past or be revived, yes ... he was indeed revived but not in the same world but in a different world.

Itachi felt that someone or something intentionally placed himself on this island because the island was storing various treasures and information needed by Itachi that he could use in this world.

Itachi spent a whole week on the island to read books and digest the information he got. Information is the most important thing wherever he is, especially in this unknown world.

From the many books he had read, Itachi found 4 information that caught his attention. The first is Devil Fruit, by eating this fruit one can get Kekei Genkai instantly but has a very fatal weakness, namely sea water and sea stones. According to Itachi, it is ridiculous if someone who lives in a world that is 90% filled with seas to eat devil fruit, doesn't that mean their weaknesses are everywhere?

The second is Haki, according to Itachi the use of Haki is almost similar to the use of Chakra, for example like Busoshoku Haki which is similar to covering the user's body parts or weapons with Chakra, such as Raikage, Tsunade or Asuma Sarutobi. Kenbunshoku Haki is similar to the sensor type Ninja or the use of Naruto's natural Chakra / Sage Mode. Whereas Haoshoku Haki is like a burst of aura from the desires and will of someone who can weaken an enemy or even kill him if the enemy has little will.

When thinking of Haoshoku Haki, Itachi could not help but think of Black Zetsu, because Black Zetsu is the embodiment of the Will itself, the will of Kaguya. He can even make his own will into a creature and not just a burst of aura.

The third is Rokus.h.i.+ki which is a special skill for world governments. It looks like Taijutsu but has more complex movements, Itachi is quite interested in this fighting skill, but he is also aware of the many deficiencies in this skill, he plans to modify it and make it better so it suits him.

And the fourth is Poneglyph, which most likely contains about the history of this world, Itachi of course wants to learn it, because he needs to know the history of what kind of world he lives in, because Information is power.

At this time Itachi had read all the books available there, he walked toward the pile of treasures, in the past week he was too engrossed in the books he read and had not had time to check other treasures.

Itachi approached a chest hidden under the pile of gold, he opened it and inside he saw a black cloak, he could not help remembering when he was at Akatsuki, but the cloak in front of him looked like the one Minato was wearing, Yondaime Hokage, it's just black and there aren't any patterns.

On the side of the robe was a katana covered with cloth, Itachi took the katana, he was immediately stunned to see a very beautiful katana, the blades of the katana were blood red as if thirsting for blood, when Itachi drew his sword, he felt the katana was like a part of the katana from his body, Itachi smiled at his new toy.

"I'll call you Blood Path." When Itachi said that, the sword shone a little as if acknowledging it, Itachi didn't really care because this was common in the previous world when someone found a weapon that really suited him. But he did not know that in this world, if such a thing happened, then that person would become a Sword Master.

Amongst the pile of gold, Itachi also saw a gray ring that was inconspicuous and looked normal, but he could see the seal around the ring. He was surprised to see that the seal looked a lot like the Fuinjutstu Seal that was normally used on storage rolls.

Then Itachi put on the ring, when he flowed his Chakra in the ring, he could feel an empty room 50 meters in the ring, then he began to find out how to use it, after a while he learned how to use the storage ring, he immediately saved all the treasures in the room into the storage ring.

Itachi then came out of the room, he stood at the top of a large tree and looked at the scenery around him. At this moment he was wearing his black cloak, a red katana hanging from his shoulder. Her long hair that was tied in a ponytail was seen fluttering in the wind.

Itachi closed his eyes and then took a deep breath, he could feel the natural energy that holds a great vitality in it, not surprisingly the growth of animals in this world became very extreme, even the natural energy in this world was much bigger and purer than the previous world.

For now Itachi decided to practice first, at this time he could not use Chakra as a source of strength, so he was very weak at this time, he was sure that there were more powerful people or creatures out there.

When closing his eyes, Itachi remembered Naruto having mastered the Natural Chakra and was able to enter Sage Mode. Itachi had also learned to master the Natural Chakra but could not master it without the help of Master Sage.

At that time, when Itachi tried to learn Sage Mode, his whole body almost turned to stone, fortunately Kisame who at that time was nearby using Samehada to absorb the raging Natural Chakra inside his body.

But he felt that this time he could do it, because the Natural Energy here was cleaner and purer. Itachi then sat on the top of a tree and began to absorb the Natural Energy around him, one hour pa.s.sed, five hours, ten hours, and three days had pa.s.sed but Itachi could not absorb the Natural Energy around him, like there was a very strong thin layer of gla.s.s blocking the Energy from entering his body. But Itachi did not give up and kept trying to break through.

[Crack !!!]

Itachi felt the barrier in his body begin to crack, the natural energy full of vitality began to slowly enter his body. But Itachi did not feel happy, even he felt anxious because he felt his body would soon turn into something he did not know, but he knew that it was a bad thing. (A / N: Imagine when Naruto will turn into a frog)

[Crack !! Crack !!]

But a few moments later Itachi felt the barrier in his body completely burst, then the enormous Natural Energy immediately entered his body. Itachi immediately felt hopeless because he could not control the Natural Energy. But at this moment his Mangekyō Sharingan suddenly began to absorb the Natural Energy in his body.

Itachi felt that both of his eyes were like a limitless storage of energy, he could absorb Natural Energy very much even at this time, showing no signs of being full. The function of both eyes is similar to the Byakugō No In Jutsu, which is a sign / seal (on the forehead) as a storage area for Tsunade's Chakra.

Itachi also noticed something that made him a little worried, because he couldn't close or stop his eyes to absorb the Natural Energy around him, he still didn't know whether this was a good or bad thing.

But the good news is that Itachi can use the Natural Energy that has been stored by his eyes as he pleases, his eyes function like filters that take Natural Energy from the outside and filter it so it can be used by his body.

Like the Mangekyō Sharingan, Natural Energy always actively flows in his body and strengthens his perception and strength.

Itachi remembered that the user of the Natural Chakra would have a tattoo on his body or face. Then Itachi picked up a mirror in his storage ring.

When he saw the reflection of his face in the mirror, Itachi was very surprised, because there were no tattoos or changes on his face but in his eyes. At this time the whites of his eyes have now disappeared and the color of Black has replaced them.

Itachi smiled bitterly seeing the changes in his eyes, he remembered when he was resurrected with Edo Tensei, the condition of his eyes looked exactly the same when he was raised by Edo Tensei, even now it seemed to have a blacker color.

But Itachi didn't really care, because at least this didn't worsen his body or damage his eyes, this was just a change in color, at least this color was better than Pink or Yellow.

At this time the problem of energy needs for his eyes has been resolved, at least he does not need to eat large amounts of food after using his Mangekyō Sharingan, because his eyes have a large reserve of Energy and even continue to absorb and store Energy automatically.

For now, Itachi needs to do another exercise before he leaves the island.

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[English is not my first language, sorry if there are many words you can't understand]