One Piece is currently in its Final Saga, where Oda has revealed some of the biggest secrets of the series. With the Egghead arc, Oda has taken a very intriguing turn in the storyline, unveiling what could be considered one of the greatest mysteries of the world, particularly those related to the Devil Fruits and the entire history of the Void Century.
Now, One Piece is unfolding in the Elbaf arc, and Oda has also gradually revealed significant secrets within the narrative that excite fans, especially concerning the land of the Giant People and the consciousness of the so-called Sun God Nika. In doing so, Oda has also unveiled a very intriguing secret about the Devil Fruits, even introducing the concept of a potentially strongest Devil Fruit in the entire One Piece world.
The Concept of the Devil Fruit in One Piece

Vegapunk himself has directly addressed the concept of Devil Fruits in the Egghead arc. Although he hasn’t extensively detailed the process of creating Devil Fruits, the scientist has clearly articulated the origins of these powers. Simply put, Devil Fruits are the result of humanity’s desires. Vegapunk believes that every Devil Fruit emerges from the hopes and dreams of individuals who have longed for something. This is a significant declaration that Vegapunk makes in the Egghead arc, and it holds great importance.
Some individuals in the One Piece world crave a certain reality, while others desire something entirely different. It is these desires that lead to the creation of Devil Fruits to grant the future they desire. In other words, those who possess the powerful Devil Fruit exist in a different dimension, shaped by the desires and aspirations of those who have come before. This is a point that Vegapunk officially declares in the Egghead arc, engaging fans and emphasizing its significance.
When considering Vegapunk’s interpretation, the range of powers can emerge infinitely. It also explains why there is a power level that seems exceptionally high, while other powers appear quite weak. Everything hinges on the desires of the individual using them. At the same time, this connects directly to the Skypeia part of One Piece, where there is a famous character named Willy Gallon. Willy stated: “Anything that a human can imagine can happen in reality.”
Based on this quote and combining it with what Vegapunk has said, fans understand that there is a chance for any kind of potential to exist in the One Piece world, and the strongest power hinted at by Oda in the Egghead part of the story is indeed a significant revelation.
Why is the Devil Fruit considered the most powerful in One Piece?

Considering every instance that Oda has discussed regarding the Devil Fruits and their creativity in One Piece, fans realize that any conceivable power can exist. For example, a set might exist as a natural phenomenon and could also be a strong manifestation of a Devil Fruit. Elements like fire, wind, and weather can naturally operate in a way that aligns with the concept of Devil Fruits.
Moreover, even more dangerous elements, such as magma, earthquakes, etc., can also exist as a powerful manifestation of a Devil Fruit. This shows that anything humanity can imagine could potentially become reality.

This is the moment when the concept of Motherflame appears. Fans recognize that Motherflame is an exceptionally powerful force that could potentially exist in the One Piece world, or rather, it has already been created. Essentially, it is a giant energy source with immense potential. This energy can be utilized to solve many of the world’s problems, providing power for everyone and making life easier.
However, at the same time, this power can also be used to destroy. Motherflame could be harnessed to provide energy for the ancient weapon, as it could theoretically correspond to the energy of the sun and potentially destroy the entire planet.

And Motherflame could easily exist as a powerful Devil Fruit, similar to other types of Devil Fruits in One Piece. If anyone desires the power of Motherflame for a long time, a Devil Fruit could potentially be born, bringing forth anyone who consumes it with the capability to destroy the world.