One For All

One For All (ワン・フォー・オール) is the transferable Quirk that is possessed by its ninth and current host, Izuku Midoriya.

In the past, it was used by its previous hosts, Nana Shimura, Toshinori Yagi, and the first six users before them.

History
Long ago, All For One, a man with a Quirk that allows him to steal other Quirks and give them away, forcibly gave Yoichi Shigaraki, his seemingly Quirkless younger brother, a Quirk that allowed him to stockpile power within his body. However, unbeknownst to either one of them, Yoichi already had a Quirk with no other power than that it could be transferred to another person. The transference Quirk and the power stockpiling Quirk merged into one and from then on became One For All.

Yoichi somehow discovered this. He had a strong sense of justice and he tried to defeat All For One, but given the huge difference in their strength, he failed. He decided to entrust the Quirk to future generations of Heroes, hoping that they would cultivate One For All and one day put a stop to All For One.

All For One sought after One For All and as a result, almost all of the users of One For All fought and were killed by his hand, but not before they each had the chance to pass on the Quirk to a successor so that it could reach the future and elude the villain. All For One attempted to steal One For All twice and failed both times, first from the fifth user and again from the sixth.

The seventh user, Nana Shimura, was the last holder killed by his hand, while her apprentice and heir to One For All, Toshinori Yagi, fought All For One at least twice, winning both battles. The Quirk was passed down through nine generations, growing stronger with the passage of time, though, it is unclear exactly how much stronger it gets. Currently, One For All is one of the most powerful Quirks in existence; however, it proves very difficult to fully master, and thus its full capabilities haven't been revealed yet.

All For One tried to steal One For All from Izuku after transferring his ability to steal powers, and with it, a copy of his consciousness, to Tomura Shigaraki. All For One tried to piggyback on Tomura's pure and raw hatred as the strength of will necessary to override One For All. However, it wasn't enough and All For One once again failed to claim the Quirk.

Very few knew the truth about One For All, for fear of what villains would do if they found out that the world's most powerful Quirk could be transferred. However, after the Paranormal Liberation War, it's name was leaked to the public when people overheard Endeavor mentioning it during his fight with Tomura Shigaraki. Though currently unaware of what it means, people were able to piece together that it is related to All For One due to the similar name.

In the aftermath of the Paranormal Liberation War, Toshinori was confronted by Best Jeanist and Hawks about One For All and how it was connected to why Shigaraki was after Izuku during the battle. Toshinori agreed to tell them everything. Later on at a press conference, Endeavor, along with Hawks and Best Jeanist, denied knowing anything about One For All, so as to protect Toshinori and Izuku.

Description
One For All is a transferable Quirk that can be passed on from one user to the next. Its name comes from its nature; being 'one' Quirk for 'all' people. In order for the Quirk to be transferred, the recipient must ingest a sample of the predecessor's DNA (ex. a strand of hair or a drop of blood).

The origin of One For All is itself a powerful will that refused to submit to All For One, because of this, the power cannot be forcibly taken. In order for the Quirk to be transferred, the current owner must freely choose to transfer it. However, it can be forcibly given, as the recipient doesn't have to agree to anything. Since One For All can't be forcibly taken, it is the only Quirk that can be used in combat against All For One, as any user of All For One would simply be able to steal any other Quirk.

One For All also allows the user to stockpile an enormous amount of raw power, allowing them to significantly enhance all of their physical abilities to a superhuman level. This results in unbelievable levels of strength, speed, agility, and durability.

The user can focus the stockpiled power into a single body part, or spread the power evenly throughout their body, although, focusing the power puts a greater strain on the part of the body where the power is focused. The user is also able to control the percentage of the power that they activate. One For All can even grant the user an exceptional strength boost to their given Quirk if they have one.

The core of One For All has grown in strength from being passed from user to user, and the Quirk Factors of all of the previous users have merged into the core, granting the current user the ability to access these Quirks. The Quirks have significantly increased in strength since they were used by their original users; this is due to the nature of One For All's core stockpiling power and increasing in strength from user to user.

In addition to the Quirk Factors merging with the core, One For All carries echoes of the consciousnesses of all of the previous users. One For All has some kind of subconscious realm where these echoes exist. It is later revealed that this is due to the fact that Quirks are engraved with the consciousnesses of their users, so any new user who receives One For All have their conscious embedded and placed into the subconscious realm. It was believed that the consciousnesses can only be embedded into One For All if the user possesses a Quirk, however Toshinori proved this to be false: since he didn't have a Quirk or a Quirk Factor to have his consciousness copied into, Toshinori instead was able to actually imbue a true piece of his consciousness inside of One For All. This allows the fragment of consciousness to fully interact with the other users and share with them everything the real Toshinori knows, which is how the other vestiges were able to learn about the life shortening side-effect of One For All.

The subconscious realm within One For All was originally a barren landscape surrounded by darkness, and vestiges of the previous holders could only share brief visions with one another. However, after Tomura Shigaraki and All For One attempted to steal One For All, they drew the vestiges out by sheer force, stabilizing the vestiges within and allowing the current and previous users of One For All to communicate with each other freely. The realm took the form of the ruins of a conference room with chairs, one for each holder, though the second and third users chose not to sit and stood in the corner with their backs turned. After having been stabilized, the previous users can now fully interact with Izuku whenever they wish, giving him advice on their Quirks and how to best use them. The realm also seems to have some connection to One For All's counterpart Quirk, All For One.

One For All draws power from the cries of help of those in need, as they are like a direct order to the user.

One For All also seems to alter the user's appearance in different ways. For All Might, it significantly enlarges his muscles and overall body mass to make him look like a completely different person, similar to a giant. For Izuku, usage of One For All causes the empowered part of his body to glow, with vein-like lines crossing through each other. His body also generates crackling, green energy that resembles lightning bolts when he activates One For All: Full Cowling. It is unknown what the usage appearance of One For All looked like for its previous handlers, however.

One For All can be duplicated, but since it is an accumulation-type Quirk, the amount of power given is practically insignificant; shown when Neito Monoma did not gain any substantial increase in power after copying it.

Weaknesses
When One For All is transferred, the new user's body is not naturally suited to it as they would be with a Quirk they were born with (ex. Someone who breathes fire doesn't burn their mouth while using their ability). In addition, One For All is a lot to handle; if ones' body can't handle the power, then their chassis could be blown apart. Because of this, the successor must undergo intense and rigorous physical training.

After One For All is transferred, the previous user is left with only residual power of the Quirk (or "leftover embers"). While they would still be able to utilize the power to essentially the same degree as before, continuous usage of it will cause their power output to decrease, until the wielder is not able to make tangible use of the Quirk at all. After All Might's final battle against All For One, his ability to sustain his Muscular Form was reduced to seconds, rending him unable to make any use of his residual power.

Following the research conducted by All Might, as well as the discourse of the One For All vestiges, it was revealed that One For All can affect the user's lifespan. If a person who already has a Quirk receives One For All, the extra Quirk places an enormous burden on their body, depleting the user's life force and shortening their lifespan, described as adding water to an already full cup, causing it to overflow and breakdown. The rate at which the person's life decays is unknown, but Hikage, the fourth user, received One For All at the age of twenty-two and died of "old age" eighteen years later, at the age of forty. This weakness can be circumvented if an inheritor does not already have a Quirk, since the Quirkless user would be an "empty cup" that is filled by One For All.

The ability to resist having One For All stolen is heavily dependent on the difference in willpower between the user and the thief: if the will of the person attempting to steal One For All is great enough, then One For All's theft immunity can be overridden.

When manifesting themselves in the unconscious realm of One For All, the current user's body is not all there at first. Some parts, such as their mouth, take time to learn how to fully manifest, making it more difficult to communicate with the other vestiges.

Assimilated Quirks
The Quirk factors of each of the previous users have merged with the core of One For All and have since increased in strength due to One For All's nature of stockpiling power. Izuku is the first user capable of accessing the Quirks of the previous users. Because All For One would constantly hunt and steal the most powerful Quirks, most of the user's Quirks are rather unexceptional by themselves and do not have enough potential to be raised to the level of ultimate moves.

The Quirks within One For All are:


 * Danger Sense: The Quirk wielded by the fourth user, Hikage Shinomori. This Quirk allows the user to detect nearby threats.
 * Blackwhip: The Quirk wielded by the fifth user, Daigoro Banjo. This Quirk allows the user to create tendrils of dark energy from their body. These tendrils are good for long-range grappling and increasing the user's mobility.
 * Smokescreen: The Quirk wielded by the sixth user, En. This Quirk allows the user to generate a thick cloud of smoke from their body. This smoke can be used to obscure peoples vision.
 * Float: The Quirk wielded by the seventh user, Nana Shimura. This Quirk allows the user to levitate.
 * Two Unknown Quirks: Two unknown Quirks that originally belonged to the 2nd and 3rd users of One For All.

Known Users and Usages
One For All has been bestowed to nine different hosts in total, starting with Yoichi Shigaraki, the younger brother of All For One. Alongside the Quirk, its origins and the story between the two brothers have been passed on.

Because One For All can only be transferred willingly, it's presumed that each wielder had some form of personal connection with at least their corresponding predecessor and successor. Every host was entrusted, not only with the Quirk but also with the duty of using it to stop the evil of All For One.

All of the previous users of One For All seem to be aware of Izuku being the ninth holder of the Quirk. When All Might was researching the previous users of One for All, he was unable to find any information on the second and third users due to the multi-faceted nature of One For All and the era back then.

Yoichi Shigaraki
The first user of One For All.

He was the younger brother of the powerful Villain, All For One. He was initially believed to not have a Quirk, but in reality, he had a Quirk with no other power than that it could be transferred to another person. One For All was formed from the fusion of his given Quirk and the power stockpiling Quirk All For One had forced upon him.

Though small and sickly, he had a strong sense of justice and did not back down from opposing his brother's evil deeds. The younger brother attempted to defeat his older brother with his newly-merged Quirk, but didn't have a sufficient level of power to do so.

He then passed One For All down to an unknown successor, in the hopes that someone in the future would eventually stop his evil older brother once and for all, a cycle that continued to the present day. Even long after his death, the younger brother is aware of Izuku being the ninth wielder of One For All, due to his consciousness being embedded into the Quirk, and showed Izuku the events leading to the creation of the Quirk.

The first's appearance is still relatively unknown. He is shown in the anime to be of similar height to All For One and, like his brother, possessed white hair. The opening "No.1" revealed that he also has green eyes of similar shade to Izuku's. And later in the manga, around the time Tomura Shigaraki began his rise to power, there was a flashback sequence where All For One had given Tomura his name and when Tomura asked if his surname had any meaning ("Tomura" means to mourn) All For One simply stated that "Shigaraki" was his last name. From this it can be assumed that the first user's surname was "Shigaraki" as well.

In Chapter 310 he was called "Yoichi" by the Second user of One For All, which means that his full name was Yoichi Shigaraki.

Second User
The second user of One For All.

He is a man with short, spiky hair, a large scar across the front of his face, and wears a combat jacket with a large black collar. He is also equipped with a gauntlet on his left arm which he seemingly uses to attack.

He was supposedly the leader of a resistance group that fought against All For One's new world order at the peak of his power. He did everything he could to fight back, including taking the lives of anyone who stood in their way. He initially had plans to kill Yoichi due to his ties to All For One, before having a change of heart and choosing to save him instead, inadvertently allowing One For All to grow in the first place.

He initially refused to accept Izuku as a successor to the Quirk, due to his optimistic desires, but is eventually convinced by Yoichi.

His proficiency with One For All is unknown, as is his given Quirk.

Third User
The third user of One For All.

He is a man with hair tied up in a spiky mohawk, with a black bandana covering his forehead, as well as also wearing a combat jacket.

He was part of the resistance fighting against All For One alongside the Second. He was there during the assassination attempt on Yoichi before deciding to rescue him instead.

Just like the Second, he also initially refused to accept Izuku as a successor to the Quirk, before coming around to it thanks to Yoichi.

His proficiency with One For All is unknown, as is his given Quirk.

Hikage Shinomori
The fourth user of One For All.

He has two cracks on his face near his left eye, going from across his left eye to his left lower lip. This damage came from the strain that One For All put on his body after wielding it for so long. He also seems to have light-colored hair.

Unlike the other users, Hikage chose not to confront All For One, aware of the enormous gap in power between them, and instead spent his time in seclusion, training himself and strengthening One For All for his successor. During the final years of his life, his body started to break down, causing scars. Hikage passed One For All onto Daigoro before dying at the age of 40.

In All Might's notes about the previous One For All users, he had some information about Hikage scribbled out. It was revealed that All Might scribbled out the cause of death, due to suspicions he had about One For All's side effects, and thanks to this, the users learned the truth that anyone who wields One For All and already possesses a Quirk will have their lifespan shortened due to the burden of power on the body.

His proficiency with One For All is unknown, though he likely used it in conjunction with his given Quirk, Danger Sense. Besides Toshinori, Hikage wielded One For All the longest, a total of 18 years.

Daigoro Banjo
The fifth user of One For All.

Daigoro was formerly known as the Pro Hero, Lariat. Described as being "super funky".

His proficiency with One For All is unknown, though he likely used it in conjunction with his given Quirk, Blackwhip.

All For One attempted to steal One For All from Daigoro twice in the past, but failed both times.

He gave En One For All by giving him some of his blood in the battle with All For One.

En
The sixth user of One For All.

En was a man with dark hair who wore a high collared jacket, and is fairly quiet due to his attire obscuring his mouth, and that his predecessor, Daigoro Banjo, introduced him to Izuku Midoriya.

Little is known about En's proficiency with One For All, other than he was not capable of bringing down All For One and the fact that All For One attempted to steal One For All from him twice in the past, but failed both times. He likely used One For All in conjunction with his given Quirk, Smokescreen. He gave Nana Shimura One For All by giving her some of his hair in a battle with All For One.

Nana Shimura
The seventh user of One For All.

Nana was a very compassionate and noble individual. She is regarded as having been a truly great and exceptional hero by incredibly powerful heroes, such as All Might and Gran Torino.

Little is known about Nana's proficiency with One For All, other than she was not capable of bringing down All For One. Nana gave One For All to Toshinori Yagi sometime prior to her battle with All For One that resulted in her death. She likely used One For All in conjunction with her given Quirk, Float.

Toshinori Yagi
The eighth user of One For All, and the first user who was born Quirkless.

Toshinori has wielded One For All longer than any other user, for a total of forty years, while almost all the other users were either killed by All For One or died of old age due to the burden of One For All. The reason Toshinori was able to hold One For All for so long is revealed to be because he was born Quirkless, meaning he could bear the burden of the Quirk since he was an empty vessel One For All could fill.

Toshinori, better known as the Pro Hero, All Might, is probably the best-known user of the Quirk, if not one of the most talented. Gran Torino once stated that Toshinori did not take long to adapt to One For All, having been blessed with an extremely resilient body, despite being born Quirkless. He was able to control and focus his power on any extremity he chose without recoil.

Throughout his career, Toshinori was regarded as the most powerful hero of all time and remained undefeated. With the goal of being a pillar for society, he put One For All to great use, defeating all sorts of criminals, rescuing countless people from danger, and turning himself into a legend. Most notably, he was the first One For All holder to battle All For One and win, though both of them suffered severe and untreatable damage that significantly weakened them both.

Due to the untreatable wounds that were inflicted on him by All For One in their first calamitous battle, Toshinori's respiratory system and stomach were left in very poor shape, and from then on, he could only utilize his Quirk for three hours a day; any more and it would strain his body. Even if he was forced to employ One For All too much, the time limit for using his Quirk would shorten as a repercussion. It was for this reason that he opted to became a teacher at U.A. High School, so that he could find a successor to pass One For All onto, and so he would have an excuse to not be out in the field doing hero work as often.

During his second battle with All For One during the League of Villains' hideout raid, Toshinori completely depleted all the "remaining embers" of One For All from his body in order to defeat the villain, essentially leaving him Quirkless once again. Although he can still transform for an instant, he cannot maintain his muscle form anymore as it causes great strain on his body, reverting back very quickly. Having retired himself from heroic activity thanks to this, Toshinori now dedicates himself to solely assisting Izuku in mastering the power of One For All so that he may become a great hero of his own.

He transferred One For All to Izuku Midoriya by giving him a strand of his hair.

Izuku Midoriya
The ninth user of One For All, and the second user who was born Quirkless.

Initially, Izuku had very little control over the Quirk and could only use One For All at 100% power, grievously injuring his own body each time, and only in short bursts at that. While this allowed him to unleash incredible displays of strength, it came at potentially lifelong physical costs, resulting in him currently having a visibly scarred, permanently crooked right hand and arm. This is because the training Izuku did prior to receiving the Quirk was only the bare minimum needed for using One For All without his limbs being blown off completely.

Later, Izuku found a way to minimize the damage to himself by focusing One For All's power into just his fingers. While he still ended up breaking his fingers, he was able to strike powerful blows and generate strong air currents.

Izuku likened the power to an egg exploding in a microwave; so to help him control the Quirk, he would envision an egg not exploding despite the pressure. During the U.A. Sports Festival, Toshinori estimated that Izuku could handle 5% of One For All full power without hurting himself.

During his internship with Gran Torino, Izuku was told by the elder Hero that his movements and attacks were too slow, as he treated One For All more like a special move rather than a natural ability. While training himself, Izuku tried regulating the Quirk's power back and forth into his legs and arms in order to scale the side of a building. Unfortunately, he discovered that Gran Torino's previous evaluation was correct, and failed to do so.

Izuku eventually realized that he was using One For All solely in the limbs that required it in that instant, thus severely slowing down his overall reaction time and adaptability. To correct this, Izuku developed One For All: Full Cowl, which takes advantage of the 5% that Izuku can safely work with to increase his overall strength and agility by letting this small amount permeate his entire body.

Using Full Cowl, Izuku can easily scale the side of buildings, jump large clearings between structures, and quickly navigate through cluttered areas. Many of his newfound movements are attributed to watching the way Katsuki propels himself using his Explosion Quirk. Izuku could react to the speed of Gran Torino and even held his own against Stain in his first real fight. Even so, if Izuku does not remain aware and in control while using his Quirk, he might go over his five percent limit and injure himself.

By the time of his second fight with Katsuki, thanks to all the training he had done, Izuku instinctively found out how to wield One For All at 8% of it's full power without repercussions.

During his battle with Overhaul, Izuku discovered that he could use 20% of his full power for a very short time if a desperate situation called for it, as extended usage would cause him to damage himself. While in physical contact with Eri, Izuku was temporarily able to use One For All: Full Cowl - 100% with no consequences, due to Eri's Rewind Quirk instantly neutralizing any damage Izuku was doing to his body.

Around the time of the U.A. School Festival, Izuku, lamenting his inability to safely perform any long-ranged moves in the battle against Overhaul, was told by All Might that he already had the capacity to do so. His mentor had planned to wait until he had firm control of at least 15% of One For All before teaching him, but seeing that Izuku could briefly bring out 20% already, he decided to do so early. After learning the technique and receiving new equipment from Mei Hatsume to help harness the wind created, Izuku was able to put the super move to the test in his battle against Gentle Criminal.

During the fifth round of the joint training session between Class 1-A and 1-B, dark energy tendrils began to fire from Izuku's arm that heavily damaged his surroundings and pulled him along against his will. This state caused him intense pain and made him unable to deactivate One For All. With the efforts of Ochaco and Hitoshi, they were able to stop the rampage of One For All by brainwashing Izuku, but this sent him into his subconscious, where he met Daigoro Banjo, the fifth user of One For All. Daigoro explains that the Quirk factors of previous holders had merged with the core of One For All and increased in strength proportionally. Daigoro tells Izuku that there are five other Quirks that he will manifest, and that the Quirk he had when he was alive, Blackwhip, had just awoken within him.

After awakening from the dark world within himself and resuming the match, Izuku was able to consciously activate Blackwhip and control it to a degree. By calming his mind and looking back on the memories of his initial training with All Might for emotional support, Izuku was able to briefly activate and use Blackwhip with his own will, but quickly deactivated it due to the pain from his body not being strong enough to handle the enhanced Quirk, and decided that he won't be ready to use it until he fully masters the base form of One For All in the future.

After training with Blackwhip for a while, Izuku manages to bring it out to save cars from being destroyed, showing proficiency with the Quirk. Izuku also manages to increase his limit of One For All from 8% to 15%.

By the time of the Paranormal Liberation War Arc, Izuku's proficiency with One For All has increased to allow him to momentarily use 45% without breaking his body. His training with Endeavor and All Might has also increased Izuku's base limit of One For All to 30%. Later during his fight against Tomura, he unlocked Nana Shimura's Quirk: Float. Towards the end of the same conflict, he unlocked the Hikage's Quirk: Danger Sense.

During a conversation with the vestiges of One For All, Izuku learns of the burden of wielding One For All if a person already possesses a Quirk, and it will shorten the user's lifespan, meaning it cannot be passed onto any normal person any longer. Izuku then realizes with the growing power of One For All and the small number of Quirkless individuals in society, he could potentially be the last wielder of One For All.

Come next April, Izuku has shown a lot more proficiency with his additional Quirks, and his able to freely speak with the vestiges while conscious. Sometime prior, he unlocked En's Quirk: Smokescreen. His strength and speed have improved to the point where he can fight on even footing with a much stronger Muscular, a villain who he barely defeated during their previous fight due to the large gap in physical prowess. It's revealed that his body has grown much stronger, allowing him to better withstand using One For All at 100% and lessening the damage from using full strength in succession, though his body does still sustain some injury.

Katsuki Bakugo
In a desperate attempt to stop Nine, Izuku decided to transfer the Quirk to Katsuki, by swapping blood through the open wounds on their hands, allowing both of them to utilize the immense power granted by the Quirk.

Despite the period of transfer and possession being extremely brief, Katsuki demonstrated great proficiency with the Quirk. He was able to instantly use One For All: Full Cowl - 100% without any prior instruction, and his body was able to handle the sheer power of One For All without being blown apart due to Katsuma Shimano and his Quirk: Cell Activation.

When Katsuki used One For All to enhance his given Quirk, Explosion, it became so powerful, standard blasts from it could create enormous craters. The temperature of the explosions was also greatly increased, to the point where it could melt through solid rock in a similar manner to lava as Katsuki came into close proximity to it.

At the end of his and Izuku's fight against Nine, Katsuki lost One for All, and the Quirk remained in Izuku's body. Toshinori initially suspected that the Quirk stayed with Izuku because Katsuki lost consciousness prior to the transfer's completion, but later theorized that One For All kept itself inside of Izuku due to his willingness to protect others, even if it meant losing the power. This may mean that the transfer only let Katsuki borrow some of the power stockpiling energy from Izuku.

All Might's Super Moves
Most of the attacks used by All Might are based on the names of states and cities in the United States of America. Even the training schedule he made for Izuku was named such.

Izuku Midoriya's Super Moves
Like All Might, most of Izuku's attacks are also based on locations in the United States. Unlike his master and idol, Izuku cannot use the full potential of One For All without damaging his body, so he must use lower percentages of power and employ it in different ways.

Trivia

 * To date, most of the moves using One For All are named after states and cities in the (e.g. Missouri Smash, Delaware Smash). This is consistent with the manga artist's desire to model All Might after American comic book heroes, especially in All Might's hero form ( and ). It is unknown if like Izuku, the naming theme is passed from teacher to student, or if this unique to All Might with Izuku's admiration carrying over.
 * According to All Might, to activate One For All, the user must clench their buttocks and scream "SMASH!" within their heart.
 * For Izuku, he visuals an egg or pastry in a microwave when activating One For All.
 * So far, with the exception of En, every known user's name contains a reference to what number user they are.
 * Yoichi's given name has the kanji for "one".
 * Hikage's surname has the kanji for "four".
 * Daigoro's given name has a kanji that is homophonous to "five".
 * Nana's given name is homophonous to "seven" in Japanese.
 * Toshinori's surname has the kanji for "eight".
 * Izuku's given name has a kanji that is homophonous to "nine".
 * One For All's name is an inversion of All For One, showing the differing philosophies between their wielders. One For All showing "One Quirk for All people" (through passing it on from person to person) and All For One showing "All Quirks for One person" (through taking Quirks from others).
 * The names of both One For All and All For One are in reference to the phrase "All for one, one for all", a motto commonly associated with the titular characters of the novel The Three Musketeers by Alexandre Dumas.
 * Users of One For All manifest differently to the point where it defies regular classification. All Might transforms into a musclebound giant, which correlates to the Transformation Class. Deku's veins glow red could easily place him in the Emitter Class because the power of One For All starts coursing through his veins. Currently, it is unknown if the past and future users will manifest One For All and how it will be properly classed.
 * It is unknown if One For All can be passed back to a previous user if the current user allows it.
 * As the truth behind One For All is only known to a select few, Izuku's Quirk is listed as "Super-Power" in U.A. and other records.
 * According to Gran Torino and Toshinori, using One For All at 100% took far less time for Toshinori than Izuku.
 * Izuku states that One For All is "one of the seven great mysteries of the world". The other six "great mysteries" are unknown.
 * One For All, All For One, Life Force, and the unnamed luminescence Quirk are the oldest known Quirks in the series.

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