The One Piece world is full of myths, but few secrets are as central to the story as the three ancient weapons: Pluton, Poseidon and Uranus. They are relics from the Forgotten Century and are considered instruments with the power to shake – or liberate – the world. In this theory, we look at what is known about each weapon, how they might be connected and what role they play in the grand finale.
What are the ancient weapons in One Piece?
The ancient weapons originate from the so-called “Forgotten Century” – an era about which the world government has erased all knowledge. According to Nico Robin, they have the power to destroy entire islands or completely change the world order. These weapons are not only physical objects, but also symbolic keys to humanity’s lost history.
They were first mentioned in Alabasta when Crocodile was searching for Pluton. Since then, it has become clear that each of these weapons is linked to one of the great ideals of the One Piece universe: destruction (Pluton), communication (Poseidon) and creation or rebirth (Uranus). Together, they could either restore the balance of the world – or overthrow it for good.
Pluton – the weapon of destruction
Pluton is probably the best known of the three weapons. It was created in the Grand Line, in the ancient city of Water 7, and is considered a gigantic battleship with unimaginable firepower. According to the blueprints passed on by Tom, Franky’s mentor, Pluton can destroy entire islands with a single attack.
Interestingly, the original ship is said to be located in Wano Kuni – underground in Onigashima or under the waters of the land itself. This was confirmed by Momonosuke and Kozuki Sukiyaki. The blueprint that Franky once burned only served as a safety measure in case the weapon was ever misused. Today, Pluton is unattainable for the time being – but its very existence threatens the power of the world government.
Poseidon – the weapon that talks to the kings of the sea
Poseidon is not a machine, but a person – more precisely, a reincarnation of the mermaid princess who has the ability to communicate with the sea kings. In the present, this is
The symbolic significance of Poseidon is remarkable: while Pluton destroys, Poseidon creates communication and balance with nature. In the legend of the ancient kingdom, Poseidon is said to have controlled the ocean currents and thus ensured global peace. Her return is therefore often interpreted as a sign of the imminent “second dawn”.
Uranus – the mysterious power over the sky and energy
Of all the ancient weapons, Uranus is the most mysterious. Almost nothing is known about it – neither its shape nor its location. Some fans suspect that it is a celestial artifact or a source of energy related to the sun or the wind. Clues can be found in the most recent chapters, in which Imu uses an unknown power to wipe out entire regions from the sky.
This power could be Uranus itself – a weapon that is the opposite of Pluton: not a physical, but a divine form of energy. Its connection to the celestial realm (Skypia, Lunaria and Enel) is increasingly likely. If Vegapunk’s theories about energy are correct, Uranus could be an ancient source of pure energy that controls the balance between sky, sea and earth.
The interplay of the three weapons
Many theories suggest that the three ancient weapons together form a system – possibly the original balance of the world. Pluton represents the power of humanity, Poseidon the voice of nature, and Uranus the energy of the heavens. Together they could represent the cycle of life, destruction and rebirth that was lost in the Forgotten Century.
Some fans speculate that Joy Boy was the only person who could unite all three weapons at the same time – not as a ruler, but as a mediator between the forces. If Luffy is indeed Joy Boy’s successor, the story’s finale could represent the reunification of these three forces – to free the world from the oppression of the World Government.
FAQ: Fan questions & theories about the ancient weapons
How many antique weapons are there?
Three – Pluton, Poseidon and Uranus. Each represents a different form of power and energy in the One Piece universe.
Is Pluton really under Wano?
Yes, according to manga chapters 1053-1055, this was confirmed by Kozuki Sukiyaki. Only Momonosuke can unlock the entrance.
Is Poseidon already active?
Yes, Shirahoshi has the ability to summon sea kings, even if she does not yet fully control their power.
Has Uranus already been shown?
Probably yes – many fans believe that Imu’s celestial attack on Lulusia was a direct operation by Uranus.
The ancient weapons are more than just tools of destruction – they are the heart of world history in One Piece. Their return could change the balance of the world, but also bring the truth about the ancient kingdom to light. Perhaps they hold not only power, but the hope of a new era of freedom.
