Every battle shonen needs a distinctive power system that makes their fight more complex and engaging than a mind-blowing exchange of blows. The more inventive and multifaceted these systems are, the more gripping the show’s showdowns will be, and no anime’s scale of powers hits the creative punch better than One Piece’s.
The series’ Devil Fruits are mysterious fruits that grant users all sorts of wacky abilities, from elemental powers to dragging their bodies. However, not all of Devil Fruit’s powers are comedic and fun. Some are dark and sinister, and the evil potential of their abilities scares both viewers and characters.
10 Flawed SMILE Devil Fruits Leave User Unable To Express Anything But Joy
The artificial Zoan-like Devil Fruits, known as SMILE, which Caesar Clown and Doflamingo produced, are a terrifying subversion of the Devil Fruits’ natural powers. By mixing bloodline factors from different animals, SMILEs can grant their users animal transformation powers. However, only a small portion of SMILE fruits are flawless.
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In 9 out of 10 cases, eating the Fruit permanently prevents a person from expressing negative emotions, even in the most extreme circumstances, as the residents of Ebisu Town have brutally demonstrated.
9 Soru Soru No Mi’s Soul Manipulation Power Is Terrifying 
The ability to manipulate human souls is a menacing power hidden within the Soru Soru no Mi, currently in the possession of Charlotte Linlin. Soul manipulation is a powerful and versatile tool that Big Mom uses to steal fragments of human souls and fuse them with objects, animals, or intangible substances, creating subordinate but self-contained puppets called homies.
The process of stealing Soul Fragments shortens a person’s lifespan, and Big Mom can manipulate the amount of life she absorbs, taking only seconds or draining the victim completely.
8 Ope Ope No Mi is a terribly versatile ability with countless disturbing properties 
One of the most defined and versatile fruits of A play is Ope Ope no Mi, a rare Paramecia-type Devil Fruit currently possessed by Trafalgar Law. With the power of this fruit, Law can manifest a space bag in which he is free to manipulate all physical properties of anything and anyone.
A less sinister manifestation of the Fruit enables the Law to heal disease. However, he can also perform all sorts of sinister operations, ranging from fusing different people’s body parts and stealing organs to extracting spirits and placing them into objects.
7 Toki Toki No Mi sends the user on a one-way trip to the future 
Toki Toki no Mi, one of the most powerful fruits in existence today, grants its user the unique ability to time travel, with a maximum of 20 years. Its former possessor was Oden’s wife, Kozuki Toki, and the Fruit allowed him to live in different eras and escape danger countless times.
However, a terrifying downside of Toki Toki no Mi is its inability to return the user to their original time, forcing them to leave their loved ones behind and exist as an outsider within unknown timelines.
6 Nobody Wants Shibo Shibo No Mi To Squeeze All Of Their Body Fluids Out Of It 
The creativity of Devil Fruits in One Piece is amazing, but not all unorthodox powers are this cool and exciting. Some, like Charlotte Smoothie’s Shibo Shibo no Mi, are so deeply disturbing that even thinking about all of their implications can be uncomfortable.
Using her power, Charlotte Smoothie can literally squeeze any living or non-living object, expelling all liquid from her victims in grotesque fashion. And what’s even more disturbing, most pressed liquids, even those extracted from humans, can be consumed as delicious juices.
5 Horo Horo No Mi Torments His Targets With Overwhelming Emotional Turmoil 
The power of a Devil Fruit depends on how its user uses it, and some of the most tamer fruits end up in the hands of skilled users who make them indestructible. The reverse happened to Perona, the user of one of the darkest fruits in the series, the Horo Horo no Mi, which controls ghosts.
Although Perona barely taps into Horo Horo no Mi’s potential, even the tricks she uses are frightening. For once, his negative slots are an ultimate weapon against determined opponents, depressing their targets too much to fight.
4 Memo Memo No Mi lets Pudding manipulate his victims’ memories 
Having your memories extracted and manipulated is a terrifying concept that manifests in Charlotte Pudding’s Memo Memo no Mi. Pudding can literally extract memories from its victim’s head in the form of a film strip and make all sorts of adjustments to the target’s subconscious.
The chilling implications of Memo Memo no Mi are endless, from erasing chosen memories to rearranging them in a different order to suit Pudding’s wishes. And in the wrong hands, like Pudding’s, the Fruit becomes a sinister weapon of manipulation.
3 People Turned Into Toys By Hobi Hobi No Mi Are Forgotten Even By Their Loved Ones 
Sugar’s Hobi Hobi no Mi is a devil fruit that everyone fears being subjected to. In addition to granting the user eternal youth, Hobi Hobi no Mi can turn anyone Sugar touches into a toy that the user can freely control and direct.
Memories of the person’s life before this macabre transformation are erased from everyone’s memory, leaving no trace of the toy’s past as a human. However, the toy retains its identity, forced to see its existence instantly forgotten by everyone close to it.
2 Pika Pika No Mi’s Terrifying Potential Is Only Limited By Kizaru’s Laziness 
At first glance, Admiral Kizaru’s Pika Pika no Mi isn’t much scarier than any other powerful Logia-type Devil Fruit. However, the ability to transform into light might be one of the strongest in the entire series. Admiral Kizaru doesn’t bother to use his full potential.
From moving at the speed of light to unleashing terrifying lightning attacks, Pika Pika no Mi is packed with unsettling techniques that, in other hands, would have easily brought about the end of the world.
1 Yami Yami No Mi Literally Turns Its User Into A Dark Human 
The most mysterious and sinister Devil Fruit in the series, Blackbeard’s Yami Yami no Mi is a Logia-like embodiment of darkness itself, which makes it downright terrifying. Not much is known about Yami Yami no Mi.
However, considering Blackbeard’s eagerness to acquire this enigmatic fruit, there is no doubt that it has great hidden potential. Known as the most evil devil fruit in existence, Yami Yami no Mi controls the unique properties of darkness, allowing the user to devour and annihilate any matter within their reach.