Haki. Before the Golden Age of Piracy. In the same era where the Rocks Pirates ruled the world with their desires and chased everyone's hearts away. A dimension-crossing Naruto in the time when Roger was still a rookie pirate and Whitebeard, Linlin, Kaido, Shiki and Rocks D. Xebec were together. Forged and bred in pure battle with the strongest rivals the seas had to offer! Pirate!

Disclaimer: I do not own the masterpieces of Naruto or One Piece as they are both owned by their respective amazing writers, Masashi Kishimoto and Eiichiro Oda, but I will honestly claim my own creations along the way.

Note to Anonymous: Try to do something more interesting with your super life, if your intention is to write trash. Write a story. From now on, don't waste my time.

Note to Flames: Go read something different. As a reader it's simple for you. I am also a reader. Just click or use Hiraishin.

Note to Fiction Inspectors: Keep inspecting.

I'm tired of dealing with foolish people. No more.

The truth is that I always wanted to write something between the lines. A story where Naruto can grow side by side against the greatest beasts known across the four seas, past, present and future. Wouldn't that be fun?

Don't ridicule, but you are free to think what you want. Just respect. This is freedom.

Let's do it when I actually have a chance not to break all my teeth.

Greatest Conqueror

Chapter 1 (Prologue)

"Conversion!"

"Red and black lightning… since when did I change my mental landscape, Kurama? Did I do this while I was sleeping or something?

The portal that that damn Ōtsutsuki descendant opened swallowed us into a different reality! Not only that, but your body and soul needed to adapt to the rules of this new world, including everything that is sealed within you.

Has our Chakra assimilated the new energy to create an entirely new one based on the power of will and spirit? Doesn't this… seem to have an end?

This power seems to be extremely uncontrollable and surprising, Naruto. Besides, I can't see the limits! Let's quickly start learning everything about it. Just fight everyone!

This fruit is strange. I can feel a strong presence. You can eat as much as you want, Kurama.

As annoying as he may seem at times, don't you dare even think about raising your weapon against the man who saved the entire world. Know your place, child. I'd rather waste my time against you than face a horde of powerful kunoichi thirsting for the blood of the poor man who forgot to do his job... in that case, it's me. Problematic. - Kagemane! (Shadow Possession!)

Get your ass here, Shikamaru! Let's explore this world!

… damn. How could this all get more problematic?

H-H-Haoshoku Haki! How is it possible that you two have this- wait! Even this nine-tailed fox!

I think I found the perfect guinea pig to test this new move of mine. Heh. Naruto! Shadow brat! Don't get in my way! - Fūrai: Tenpechii! (Thunderstorm: Natural Disaster Befalling Heaven and Earth!)

Are we going to turn the world upside down?

Did you mean… like rivals?

Chō Ōdama Rasengan! (Ultra-Big Ball Spiraling Sphere!)

Impossible! Damn… this… this is pure concentrated Haki- GAH!

Heh. That's fun. I'm starting to like this so-called… Haki!"

~ ?

The trees stretched across the horizon, but only the sea could top this incredible sight.

Two men walked through the uninhabited and verdant place of forests surrounding the place that, after the events that occurred during the Final War, had become the capital of the shinobi continent.

Konohagakure was now home to all ninja.

The first figure had bright blond hair like the rising sun and sapphire eyes like two precious stones. A wide, lively smile rested on his mature face, with his birthmarks like whiskers on his cheeks.

His clothes consisted of a two-color jacket, orange and black, and orange pants that reached above his ankles, with simple black sandals.

He moved forward with firm steps and behind his back the other walked relaxedly, a fact evidenced by his slightly drooping shoulders and slow posture, although protective and alert to every slightest detail.

After all, that was his duty as the Konoha Hokage's Chief Aide and longtime friend.

"You didn't need to accompany me here, Shikamaru. Besides, I doubt there's anyone capable of standing up to me, you know." – the first said jokingly with a light tone. The short white cape he wore over his shoulders with details of flames licking the bottom did nothing to impede his movements.

"Problematic. Tell that to the entire population of Konoha, including those troubled women. Thank you very much, but I would rather sigh every ten seconds than be in the village right now, Nanadaime-sama." – replied the other ironically, and continued to guard the taller man's back.

"… no need to exaggerate, Shika."

"Problematic."

It happened suddenly. At that moment, a gigantic, bluish portal opened miles ahead, but the suction power was so overwhelming that it was dragging the leaves and small trees in the position of the formidable duo.

The Nara Clan Head immediately placed himself protectively in front of arguably the most powerful Hokage of all time, and just as he was about to form the hand seals for a jutsu, he felt the Uzumaki's bandaged hand rest on his shoulder.

"Calm down, Shika. Let's go see what this is." – Naruto ordered in a calm voice and gave his friend's shoulder a light squeeze, who relaxed immediately after that.

"… troublesome. Understood, Hokage-sama." – Shikamaru sighed with a positive nod and put his hands back in his pocket to walk with his friend. The reason he sighed was the sight of the hundreds of clones the Nanadaime summoned to deal with the matter.

The world would never be the same again.

To be continued.

Author's Notes: And here we go again. Don't forget it's just a prologue for now. I will try to make the next chapters longer and with a high word average.

I think this is a concept that has never been worked on either. And remarkably I must be the first to debut this with my imagination. Predictions.

As always, the continuation of the story will depend on the things that are expressed. So review aloud! I certainly won't spend my time writing from a simple smartphone to not receive any kind of review, be it good or bad, but with respect.

Inspire me to keep going, because each review can help me set an improved course for this journey! Do not forget!

I wonder what you guys think. Let me know in the reviews.

Tengoku no Kotei is out.