Towards the end of the Wano Country arc, Luffy managed to awaken his powerful Devil Fruit that fans knew to be the Gomu Gomu no Mi throughout the entirety of the One Piece series, up until that point. In chapter 1044 of One Piece, it was revealed by the Gorosei that Luffy had actually eaten a Mythical Zoan devil fruit called the Hito Hito no Mi, Model: Nika.
This Devil Fruit is known to have been incredibly overpowered and, as such, the World Government tried acquiring it for centuries yet it evaded them every single time. Its powers have now been truly awakened and it has been labeled as the most ridiculous power to ever exist, for several reasons.
7 Can Turn Anything Into Rubber
One of the most interesting things about Luffy's Devil Fruit is that it can turn anything around him into rubber. Typically, this is a power that is demonstrated by the Paramecia-type Devil Fruit Awakenings. For instance, Doflamingo was able to turn the world around him into strings. Similarly, Katakuri was able to turn the world around him into mochi. Yet Luffy, despite being a Zoan, is able to exhibit the same Devil Fruit properties through his awakening.
Why this is the case is not known just yet. This surprised even Kaido, one of the Yonko of the Sea. In fact, Luffy is able to take this ability to another level by changing the properties of living things with it as well, as seen with Kaido. No other person has ever demonstrated this power.
6 Offers An Overpowered Transformation
Being a Mythical Zoan means that Awakening grants an overpowered transformation. According to Kaido, all the users of Zoan Devil Fruits, when Awakened, grant a special transformation to the user.
This can be seen when Luffy gets an all-white form and fans know it better as Gear 5th. In this form, Luffy grows tremendously stronger and gains enough power to take on even the likes of Yonko Kaido in combat. This transformation allowed him to best the Yonko and that alone is reason enough for this power to be absolutely ridiculous.
5 Body Of A Giant
Thanks to his body being rubber, Luffy can alter it as he likes. In the fight against Kaido atop Onigashima, Luffy was able to turn himself into a giant within mere seconds. As fans might remember, previously, Luffy required inflation to access the powers of a giant through Gear Third. In Gear Fifth, he does not need to inflate his body as he can immediately turn it into that of a giant.
In fact, his body is actually much larger than that of a normal giant, as it was towering over Kaido's dragon form, which in itself is extremely massive.
4 A Natural Disaster
The Hito Hito no Mi, Model: Nika is a ridiculous power in more ways than one, as mentioned earlier. Not only can it affect Luffy's surroundings and the people around him, but it can also allow him to become a literal natural disaster. Luffy can turn anything around him into rubber and this includes the forces of nature as well.
When in the skies, Luffy can give the properties of rubber to a raging thunderstorm and control lightning as he wishes. Similarly, it can be assumed that in any other natural disaster, Luffy can attribute the same properties to them and control them as he likes.
3 The Power To Destroy Islands
The Nika fruit also gives Luffy the power to destroy islands. Towards the end of the fight against Kaido, Luffy used the very best of his abilities to take down the Yonko. He created a fist of the size of the entirety of Onigashima after he took to the skies and coated it in both the Color of Armament and Conqueror's.
The size of the fist was such that Luffy required Momonosuke to move the island out of the way before he struck Kaido. The Yonko even tried to fight back against it with his strongest form, however, it was not enough to overcome the might of the Hito Hito no Mi, Model: Nika.
2 Can Manifest Things Out of Nowhere
Yet another ridiculous power that the Hito Hito no me, model: Nika offers is to manifest things out of nowhere. This was recently seen in the Egghead Island arc when Luffy was fighting against Rob Lucci.
In the middle of the battle, Luffy somehow manifested goggles from his hair and used them to land a perfect blow on his nemesis. How exactly this works is something that fans do not know just yet. However, this just goes to show that anything is possible with this ridiculous power.
1 Limited Only By Imagination
The Nika fruit is only limited by Luffy's very own imagination. It can be much worse under someone with an inferior imagination or stronger under someone with a better imagination. There is nothing that this fruit cannot accomplish and that is truly what makes it the most ridiculous power to ever exist in the world of One Piece.
While it might not be the strongest in literal terms, under someone who can find unique ways to use it, such as Luffy, this power very well belongs right up there alongside the very best.