And here's the final version for the MS.
Mangekyo Sharingan v2 (
Official Version)
The Mangekyo Sharingan is the evolved state of the Sharingan, kekkei genkai of the Uchiha Clan.
When activated, their three tomoe
transforms into a
new pattern that it is unique to the individual which is why it is named after a kaleidoscope.
This evolution amplifies the Sharingan's innate abilities such as the Eye of Insight to improve the clarity of their visual perception or the Eye of Hypnosis to to weave even more
powerful illusions. And each Mangekyo favours one of these abilities over the other depending on the wielder's talents and affinity. A Straight Tomoe is most compatible with the Eye of Insight, granting
fluidity to their movement as their perception allows them to perfectly evade and counter their enemy. A Curved Tomoe is most compatible with the Eye of Hypnosis, granting clarity to their chakra visions and further empowering their genjutsu.
Most importantly, the Mangekyo Sharingan grants its wielder powerful jutsu that makes them far more dangerous than the typical Uchiha. These would take decades for ordinary ninja to create themselves and likely still not be as powerful or useful.
Abilities like creating
black flames that burn for seven days and nights, genjutsu that controls the perception of
space and time, hypnosis that dominates the
victim’s mind without them knowing, transporting its target to a
subspace or creating a
guardian spirit of chakra.
The jutsu that one acquires varies from individual to individual but there are a finite number of them in total. Despite the appearance of each Mangekyo Sharingan being unique, more than one individual can have the
same jutsu - making some recognize them
on sight when used by someone different - though certain abilities are rarer than others. And an unusual trait for these jutsu is that the wielder does not name them. Instead each jutsu has its own name which they instinctively learn after exploring their abilities.
Each eye has its own jutsu but they may be entirely different from one another,
complementary to one another,
exactly the same as one another or have the same one but with
different aspects in each eye.
Awakening the Mangekyo Sharingan
Among the small number of Uchiha who have acquired the Sharingan, even fewer of those have met the conditions needed for the Mangekyo Sharingan.
Where the Sharingan is awakened by the Uchiha by experiencing strong emotions, even greater extremes are needed to awaken the Mangekyo Sharingan.
To acquire it, one must at least have awakened the Sharingan regardless of its stage of maturation. Then they must directly experience the loss of
losing a loved one by witnessing their death. If the depth of their
grief and sorrow is strong enough - overcoming even the emotional conditioning and calloused heart of a shinobi - it triggers a reaction within their doujutsu to elevate it the
next stage of evolution. Even if the Sharingan had not yet fully matured, it
automatically does so upon awakening the Mangekyo Sharingan.
The origins of this evolution lie with the progenitor of the clan,
Otsutsuki Indra.
He was born with the Sharingan and its powers of insight and hypnosis but he discovered that he possessed even greater ocular powers later in life. He found that he could transform his eyes into an evolved state through which he could unleash a variety of
powerful jutsu. These abilities were passed down to his descendants but were buried deep in their bloodline which could not easily be harnessed.
The first to awaken the Mangekyo Sharingan were the brothers
Uchiha Madara and Uchiha Izuna, several centuries after Indra's lifetime.
A lifetime of war had weakened the mind of their father and the leader of their clan,
Uchiha Tajima. He had lived longer than most shinobi and remained a powerful shinobi, but his mental instability caused him to make mistakes that fractured the clan's strength and was ultimately leading them to ruin.
To save the clan, the brothers killed their own father.
However the love and respect they had for their father made the act one of emotional torture that served as a trigger for their doujutsu's evolution. Together, they named it the
Mangekyo Sharingan which they used to
unite the clan with Madara as their new leader.
When the rest of the Uchiha learned how they awakened it, more than a few became desperate to possess it themselves. And the only way to awaken the power by choice, instead of by chance, would be to willingly kill someone they loved. By
killing a loved one, it forces them to not only experience the pain of their death but combines it with the guilty of causing that death in the first place which practically guarantees the awakening the Mangekyo Sharingan.
It became a ugly secret among the Uchiha that one who has acquired the Mangekyo Sharingan is one that may have murdered a friend for it. But that was merely the price of power.
Controlling the Tailed Beasts
The Sharingan has the potential to
control the Tailed Beasts.
Ordinary genjutsu have proven unable to affect the Tailed Beasts as ninja are not capable of manipulate their immense and powerful chakra with their own. But the origin of the Sharingan's ability gives it a unique connection with the beasts to influence them.
Only those with the most powerful, fully mastered Sharingan are capable of using its power on the Tailed Beasts and even then they would only be able to
suppress a portion of their strength to weaken them. For this reason, as well as the sheer destruction the beasts would inflict on those foolish enough to fight them, the ability was practically unknown.
But by awakening the Mangekyo Sharingan, that potential is realized in full. Even without using the
evolved doujutsu itself, they are able to
dominate the Tailed Beast to bend them to their will.
Uchiha Madara proved this after he abandoned Konohagakure when he found the Nine-Tailed Fox, the most powerful of the Tailed Beasts, and controlled it
with his Sharingan to fight against Senju Hashirama. The scale of the battle and the apparent death of Madara made it a
legendary event that spread the news of the Mangekyo Sharingan's previous unknown power.
The Uchiha chose to edit the stone tablet passed down in their clan to show those with a mastered Sharingan how to acquire the Mangekyo Sharingan and the powers it possessed.
Cost of the Mangekyo Sharingan
The price exacted from possessing the Mangekyo Sharingan is
blindness and the more one uses the eyes then the faster they
lose their eyesight.
Each time one of its jutsu is cast, it causes a physical backlash upon that eye which damages their nerves, blood vessels and lens. In the immediate sense, this results in the wielder suffering intense pain and even increasingly worse
bleeding from that eye but this has the permanent effect of weakening their vision. Over time, they experience episodes of disorienting
double vision and their eyesight becomes increasingly
dim and blurry - even with the Sharingan's supernatural acuity - until they
cannot see anything.
If one never used the Mangekyo Sharingan, it would take decades to go blind. But anyone who awakens this power is unlikely to ever avoid using it if needed. The rate at which the eyes lose their vision depends on how many times they are used and how often they are used. But using it
too many times in a short period means suffering the greater pain than usual and the
vision worsens at a faster rate as well. But by carefully conserving the use of their jutsu, they can preserve these abilities for years if not decades.
Medical ninjutsu and medicine is only able to heal the short-term effects of the eye to reduce inflammation and bleeding but the damage to their eyesight is immune even to the most skilled of medical ninja. Otherwise there are only two ways to overcome the Mangekyo's Sharingan.
One is the cells and chakra of Senju Hashirama because of the powerful life force and regenerative ability of his unique body. By
implanting his cells into their body, one becomes almost entirely immune to the damaging effects of the evolved doujutsu which allows them to perform as many of its jutsu as they desire without losing their eyesight.
The second is the last evolution of the Sharingan.
Eternal Mangekyo Sharingan
The
Eternal Mangekyo Sharingan is the final stage of the doujutsu.
By replacing their Mangekyo Sharingan with the eyes of a direct blood relative - such as a sibling, parent or offspring - who has also achieved Mangekyo Sharingan, the host's chakra mixes with the donor's in the transplanted eyes to awaken an
evolved version of the doujutsu. This evolution is reflected in the changed pattern of the eyes which are a combination of the host and donor's original ones.
Those who possess it can wield all of the powers of their original Mangekyo Sharingan and their vision is
restored to perfection. Their eyes still bleed as an aftereffect of channeling the incredible power of these jutsu but it does not cause them any pain or long-term damage.
The doujutsu's abilities are actually no more powerful than before. Every use of the eyes in their previous state was physically painful to use and the permanent consequences meant that it needed to be used sparingly; they could not be practiced like ordinary jutsu and had to be
tested in live combat instead. Now that the only cost is the amount of chakra, the wielder can
train and
experiment with their doujutsu as much as they need without losing focus. This makes it far easier for them to draw out their doujutsu's true potential and makes its wielder far more dangerous than their previous self.
Unlike the instantaneous awakening of the Sharingan and the Mangekyo Sharingan, awakening the Eternal Mangekyo Sharingan is a
gradual process as the eyes
recover from the transplant and mix the
respective chakras together over time. If the eyes aren't compatible for evolution then the host instead only gains the abilities of the donor's eyes.
The only two people to have ever awakened the Eternal Mangekyo Sharingan are Uchiha Madara and Uchiha Sasuke.
In his numerous battles against Senju Clan, Madara had
nearly lost his eyesight from overusing the Mangekyo Sharingan. As his
younger brother lay dying from their last battle with the Senju, Izuna
offered his less damaged eyes to Madara so that he could continue protecting the Uchiha Clan in his absence. Madara tore out his own eyes and replaced them with his brother's, unknowingly starting the transformation that restored its sight and made it eternal.
Those who followed in the brothers' footsteps and awakened the Mangekyo Sharingan themselves tried to achieve this evolution as well but continually failed. With there only being a single precedent - and the exact circumstances involved weren't something that Madara shared with his brethren - Uchiha would steal the
eyes of their own clansmen in the hopes of awakening the Eternal Mangekyo Sharingan only to fail continually. It was only through trial and error that they came to the conclusion that it would only work with a direct blood relative who had awakened the Mangkeyo Sharingan themselves.
But awakening the Mangekyo Sharingan became less common over the generations; the initial craze for its power fading and the Uchiha placing strict control over one another. It became a
rare thing but those who did possess its power were still
respected among the clan for said power.