The Ancient Weapons
Three cataclysms from a lost age that hold the power to end or save the world.
The Ancient Weapons are three legendary armaments of mass destruction from a bygone era, said to possess the power to reshape the world or even destroy it entirely. Created during the Void Century, these weapons—Pluton, Poseidon, and Uranus—are not merely tools of war but keys to the ultimate secrets of history, deeply intertwined with the fate of the World Government and the Revolutionary Army's struggle.
While their existence was long treated as myth by the general public, they are central to the overarching narrative of the pirate age. Each weapon is unique: one a warship capable of leveling islands, another a human who commands the sea creatures, and the third an enigmatic force in the sky whose true nature remains a mystery even to the highest echelons of power.
- Origin Era
- Void Century
- Known Weapons
- Pluton (Warship), Poseidon (Epithet for Princess Shirahoshi's ability to command Sea Kings), Uranus (Unknown)
- Current Status of Pluton
- Built in Water 7 by Tom's shipwrights; current location unconfirmed
- Current Status of Poseidon
- Awakened in the hands of Princess Shirahoshi
- Associated Figure
- Joy Boy (Ancient King)
- Primary Antagonist Interest
- The World Government / Imu
Lore & Background
Uranus remains the most obscure of the trio, with no confirmed details on its form or function beyond its name suggesting a connection to the sky. The World Government has spent centuries hunting down these weapons, fearing that their re-emergence would expose the truth of the Void Century and shatter their authority. The balance of power in the world hinges on whether these forces are used to enforce tyranny or to fulfill an ancient promise of liberation made by a figure known as Joy Boy.
In Their Own Story
The waves crashed violently against the hull of the Thousand Sunny, but the silence within the library was heavier than any storm. Nami traced her finger over the faded illustration of a ship that could swallow islands whole, her voice barely a whisper. 'Pluton,' she breathed, the name tasting like ash and old secrets. Across from her, Nico Robin stared into the void, her eyes reflecting the weight of centuries. 'It is not just a weapon,' she murmured, the Poneglyph's translation echoing in her mind. 'It is a promise and a curse.' Suddenly, a low rumble shook the deck, not from the sea below, but from the sky above, as if the very atmosphere held its breath, waiting for Uranus to reveal itself once more.
Reader's Guide
The Ancient Weapons represent the pinnacle of lost technology and power in the One Piece world. Unlike Devil Fruits or Haki, which are personal abilities, these weapons are forces of nature that can alter geography and history. Pluton is a warship built from an indestructible wood, capable of destroying islands with its main cannon. Its existence is known only through Poneglyphs hidden in various locations, including the ruins of Ohara and the depths of Wano Country.
Poseidon differs significantly as it is a living person. This power manifests in a specific lineage within the Neptune Family of Fish-Man Island, appearing every few centuries. The current bearer, Princess Shirahoshi, possesses the ability to summon Sea Kings, which can be used to move entire islands or crush fleets instantly. This connection ties directly to the prophecy of Joy Boy and the promise made to the merfolk.
Uranus is the least understood, with no confirmed sightings or descriptions in the current timeline. Its name implies a celestial origin, possibly related to weather manipulation or sky-based destruction. The World Government's primary goal regarding these weapons has been suppression; they fear that if all three are united, the truth of the Void Century will be revealed, potentially ending their rule forever.
Did You Know?
- The name 'Poseidon' for the human weapon is a direct reference to the Greek god of the sea, mirroring the Sea King connection.
- Pluton's blueprints were originally hidden on Poneglyphs specifically so that no single person could ever construct it without gathering all the scattered pieces.
- The World Government has actively hunted down anyone who discovers information about these weapons for over 800 years.
- Uranus is the only Ancient Weapon whose physical form or method of activation remains completely unknown to the reader and characters alike.
Frequently Asked Questions
What are the Ancient Weapons?
They are three legendary armaments from the Void Century capable of destroying entire landmasses or reshaping the world. Known as Pluton, Poseidon, and Uranus, they were created by the ancient kingdom before its destruction.
Where is Pluton currently located?
The blueprints for this warship are hidden within Wano Country and recorded in Oden's logs. It was originally built by Tom’s shipwright family but remained unfinished to prevent misuse.
Who holds the power of Poseidon?
Unlike the others, this weapon is a living person currently identified as Princess Shirahoshi of Fish-Man Island. She possesses the unique ability to summon and command all Sea Kings through her voice to reshape the ocean floor.
What is known about Uranus?
The identity and location of this third weapon remain a mystery within the current storyline. It is speculated by characters like Crocus to be related to the sky or energy, but no concrete proof exists yet.
Why does the World Government fear them?
These weapons hold enough destructive power to topple the current order and reveal the true history of the Void Century. Imu seeks to control them to maintain their dominance over the world while others hope to use them for liberation.