These Devil Fruits aren't necessarily hard to use, just that to use them to their fullest ability is incredibly difficult.

Eiichiro Oda really hit it out of the park when he created the main power system for One Piece, which is Devil Fruits. As a general concept, they are quite easy to grasp since they are fruits that, upon consumption, grant the person a certain ability, which can range from being incredibly goofy to powerful enough to destroy the entire world if the user chooses. They are often the reason why so many characters are so powerful in the first place.

However, while the method of gaining these powers is straightforward and easy to do, there are a few Devil Fruits in One Piece that are incredibly difficult to make full use of. While still powerful with their basic abilities, the truth of their strength only shines through once the user has mastery over them, which is very difficult to achieve. So, in this article, let's take a look at the hardest Devil Fruits to master.

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The Nika Fruit Is The Strongest Power With A Massive Catch To It

Category: Mythical Zoan

Luffy awakens his Devil Fruit and unlocks Gear 5 - One Piece

First Appearance

One Piece, Chapter 1, "Romance Dawn - The Dawn of Adventure"

Alternative Names

Gomu Gomu no Mi - The Gum-Gum Fruit

  • Incredible stamina is needed for it.

This is the pinnacle of what I can do!

Throughout the series, the signature Devil Fruit of One Piece, Luffy's legendary Nika fruit, is perhaps the strongest power we have seen so far, since it can manipulate reality to an extent. However, once the true power of this Devil Fruit has been unlocked through Awakening, leading to the Nika form, it demands an insane amount of stamina for sustained use. When it's used for far too long without refueling, the user's lifeforce and energy are completely depleted, as was seen in the Wano and Egghead arcs, where Luffy was completely out of the fights.

Blackbeard's Yami Yami no Mi Has A Pretty Glaring Weakness

Category: Logia

Blackbeard summons darkness in his hand - One Piece

First Appearance

One Piece, Chapter 440, "Fire First vs. Blackbeard"

Alternative Names

The Darkness-Darkness Fruit

  • A unique Logia fruit.

The other thing that my darkness can absorb is the power of Devil Fruits!

Out of all the Devil Fruit categories in One Piece, Logias are the most straightforward in terms of how they work. Because of this, users of these fruits can become incredibly strong without much effort. While this is true for Blackbeard's Yami Yami no Mi as well, it is unique within its class as being the only Logia that doesn't make the user intangible. Conversely, it doubles the damage that he takes due to its inherent property of absorbing things, making it a very tricky Devil Fruit to master, but definitely the strongest Logia type of them all.

One Piece_ Mini Gear 4 And 5 Other Forms Of Luffy Oda Revealed That You Don't Know About (1) (1)
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The Ope Ope ni Mi Can Only Be Used To Its Full Ability In The Right Hands

Category: Paramecia

Law generates a room - One Piece

First Appearance

One Piece, Chapter 504, "Pirate Front Line on the Move!!"

Alternative Names

The Op-Op Fruit

  • Only someone with the right knowledge can use it properly.

The pinnacle technique of this fruit is the ability to grant eternal life!

The Ope Ope no Mi is easily one of the most powerful and sought-after Devil Fruits in the entire series, and its true power has been on display multiple times against very powerful opponents, especially after Law unlocked its Awakening. Its signature 'Room' ability allows the user to treat the world and anyone within its area of effect as if they're on an operating table. However, the difficulty in mastering it comes from the knowledge that the user needs as a doctor to be able to use it to its fullest extent, which is why only Law can use it so well.

Doflamingo's Ito Ito no Mi Does More Than Just Creating Strings

Category: Paramecia

One Piece - Donquixote Doflamingo creating strings with his Devil Fruit.

First Appearance

One Piece, Chapter 234, "Please Remember"

Alternative Names

The String-String Fruit

  • Easy to use, hard to master.

Whoever wins this war becomes justice!

Doflamingo was the manipulative and evil villain who was able to take over an entire country due to the powers of his Devil Fruit, leading most to consider him One Piece's best antagonist. On the surface, the Ito Ito no Mi is easy to use, as it lets the user create incredibly sharp and powerful strings that can cut through solid rock, but the way Doflamingo uses it can only be done by someone as smart and manipulative as him, which is the controlling aspect of the fruit through the strings. By attaching his strings to people, he can control their actions completely.

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Robin's Hana Hana no Mi Is A Simple Fruit But She Uses It Masterfully

Category: Paramecia

Nico Robin using Demonio Fleur Gran Jacuzzi Clutch on Black Maria - One Piece

First Appearance

One Piece, Chapter 114, "The Course"

Alternative Names

The Flower-Flower Fruit

  • A very simple ability.

Thanks for relying on me for help. I really appreciate that!

The ability of the Hana Hana no Mi is very simple, in that it grants the user the power to spawn body parts from any surface, similar to the petals of a flower. Although it's very useful for many things, one wouldn't think of it as being one of the strongest in combat. However, Robin uses it expertly by creating giant versions of herself that are strong enough to defeat Black Maria of Kaido's Tobiroppo, which just shows how hard it truly is to master completely. Surely Robin is a one-of-a-kind user of this power, and once she unlocks Haki, she'll be even stronger.

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One Piece
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Release Date
October 20, 1999
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