~Flashback~
"What brings you here, Aokiji?" Madara asked leisurely. But one could easily notice the playfulness and arrogance in his tone.
Those in the Pirate world may not know his terror but in the world of Shinobi, just the mere name would make any Shinobi tremble in fear.
Yes, this Madara was the real Madara, not the one Hiruzen transformed into.
Last time he visited the Naruto world he made his shadows search the place where Madara was hiding before his death and managed to find it. So without alerting Zetsu, he created him as his shadow soldier.
And the best gain was that this shadow soldier was not only at the level of Marshall but it also retained its Sage eyes, Rinnegan. This realization made Sora very happy.
So after coming back to the One Piece world, he changed the original Madara with the fake Madara.
"I am here on behalf of the world government to invite you to join the Warlord system," Aokiji replied with much hope.
"Ho? Warlord? Are you asking an Emperor to play with kids? I don't have any intention of playing house with you brats and WG." Madara replied sarcastically.
Well, he also retained his arrogance. It's not uncommon for shadow soldiers.
Aokiji paused and felt speechless. He didn't continue further since Madara had no intentions of joining the Warlord system.
It was already hypocritical to try to invite an Emperor to join the warlord system. But since Madara never tried to go to sea for piracy the WG tried to try their luck.
But it was clearly they thought too highly of themselves and less about an Emperor.
Just as he was about to leave Madara said "What's so hurry?" He stood up from his throne and said "I heard you admirals are pretty strong. How about we dance for a round?"
Well, Madara actually never got the chance to battle an admiral as he just came to this world. It was previously Hiruzen who usually fought with the Marines.
The Emperor title was also achieved by him because he had many notorious pirate captains under his flag.
Aokiji looked at Madara and got serious. He could sense Madara's fighting spirit was soaring.
Aokiji tightened his fist and the air around him also started to freeze.
Madara grinned and rushed to Aokiji and kicked him hard. Aokiji without even flinching blocked the kick with his hand covered in haki.
But to his horror, he was sent flying out of the window, directly to the sea by the force behind the kick.
Madara laughed excitedly and chased him as he knowing that this simple kick would not finish one of the strongest in the sea.
In a blur, Madara charges forward, hands weaving seals.
"Katon: Gōka Mekkyaku!" — A towering wall of flame roars from his mouth, rushing toward Aokiji like a tidal wave of fire.
Aokiji balances himself on the sea and steps forward and slams his hand into the ground.
"Ice Age."
In an instant, the ocean behind him freezes solid, and a glacial storm counteracts the flames, steam hissing violently as fire meets ice.
The ground ruptures from the clash — half scorched earth, half crystallized frost.
Madara's eyes narrow. Susano's ribs form around him as he rushes in, drawing his war fan (gunbai). He swings — a concussive blast of wind and chakra erupts.
Aokiji phases into ice shards, reforming midair. He slams his foot down, "Ice Time Capsule!"
An ice spear erupts from beneath Madara — but the Uchiha is gone.
Madara appears above with blazing chakra blades — a partial Susano'o arm swings down. Aokiji blocks with a wall of ice, but the impact sends shards flying for miles.
Aokiji tries to freeze Madara directly, using Ice Saber attacks enhanced by Haki. But as he stares into Madara's eyes—
Genjutsu activates.
For a split second, Aokiji sees himself encased in ice, helpless—his limbs frozen mid-movement. But his Observation Haki snaps him out just in time.
Aokiji gritting his teeth says, "So, illusions… not bad."
Madara smirks and calls forth his full Perfect Susano'o — a towering spectral samurai, armed with twin ethereal swords. The entire battlefield trembles.
Against some on the level of admirals, Madara didn't just want to compete in physical force.
Aokiji raises both hands, "Ice World: Tundra Coffin!"
Pillars of glacial ice rise and crash, freezing the legs of Susano'o. A blizzard forms above as the temperature drops to sub-zero extremes.
But Madara laughs, "This is not even my final dance."
With a single command, his Susano'o draws back both swords and releases a cross-slash of pure chakra and flame. The attack cleaves through the storm, burning through ice, splitting the tundra apart.
The intense battle continued for a full day which mesmerised the onlooker. Many tremble in fear and many in excitement. But one thing was clear for everyone, the truly strong in the world were terrifying.
When the dust settles, the valley is half vaporized, half frozen in eternal winter.
Aokiji kneels, breathing heavily, his left arm frozen and cracked.
Madara stands tall, armor scorched, but grinning at him.
Madara replied amusingly "You're strong…. but you lack the will to dominate."
Aokiji replied without stepping back, "Maybe. But sometimes… ice is what tempers fire."
Madara laughed and said "Go back. I had my fun. But you are still miles away from the true peak."
'Should I give Whitebeard a visit? I heard he is the strongest man in the world.' Madara murmured but Aokiji heard him and felt speechless.
So he gave Madara a hard look and left on his bicycle.
What he didn't know was that Madara truly didn't use his full power. He didn't even use his EMS ability let alone Rinnegan's power.
~Flashback end~