1. The Ancient Weapons in One Piece: The article discusses the ancient and powerful weapons that exist in the world of One Piece, including Pluton, Poseidon, and Uranus. These weapons are said to have the ability to raise the sea level, potentially changing the functionality of the entire planet.

2. Pluton: Pluton is described as a massive and incredibly powerful ship-like weapon that can destroy entire islands and cities. It is said to be capable of altering the geography of the world, making it a highly sought-after and dangerous artifact.

3. Poseidon and Uranus: The article also mentions Poseidon, which is the ability of certain individuals to control the sea and its creatures, and Uranus, which is a mysterious and largely unknown ancient weapon that is yet to be fully explored in the series.