Article summary:
The Ancient Weapons are three weapons of mass destruction inherited from the Void Century. They bear the names of gods: Pluton, Poseidon, and Uranus. The World Government seeks them to control the world, while pirates seek to prevent them from causing harm (or to use them). In 2026, we finally know where they are.
They are the main reason why the Poneglyphs are forbidden. Whoever controls these weapons controls the fate of the planet. But what exactly are they? Objects? Living beings? Let's take stock of the ultimate threat on the Grand Line.
Powers capable of sinking entire islands.
Pluton: The Worst Warship in the World
Pluton is not a god; it is a technologically advanced warship capable of destroying an island with a single shot. The construction plans were held by Franky (who burned them), but the original ship still exists.
As revealed at the end of the Wano Country Arc, Pluton lies dormant beneath the Land of Wano. To release it, the walls protecting the country must be destroyed, which explains why Kozuki Oden wanted to "open the borders."
Franky memorized the plans. To learn more about the cyborg, read our article: Franky and the Plans for Pluton.
Poseidon: The Mermaid Princess
Unlike Pluton, Poseidon is a living being. It is the ability to communicate with and control the Sea Kings (giant sea monsters). Currently, this power resides in Shirahoshi, the princess of Fish-Man Island.
This power is essential for pulling the Noah ark, a promise made by Joy Boy 800 years ago. Shirahoshi is therefore a priority target for the Government. Discover the details of this legend in our feature: The Prophecy of Fish-Man Island.
Find the princess and the heroes of the seas in our collection of One Piece figurines.
Uranus: Judgment from the Skies
Uranus is the most mysterious of the three. Long unknown, it is now strongly suspected to be the weapon used by Imu-sama to annihilate the kingdom of Lulusia in a matter of seconds.
It is believed to be a flying fortress or an orbital cannon powered by the "Mother Flame" created by Vegapunk. It is the Government's ultimate weapon of domination. We analyze its possible location here: The Awakening of Uranus.
Conclusion: The War for the Weapons
Pluton is underground, Poseidon is beneath the sea, and Uranus is in the sky. The final battle will necessarily involve these three forces. Luffy will have to protect Shirahoshi and prevent Imu from using Uranus again.
To understand the geopolitical stakes, visit our cornerstone page on the Marines and the World Government or delve into the legendary secrets of One Piece.
Prepare for the clash of the titans by exploring our One Piece home décor shop!