Reverse Cursed Technique

Reverse Cursed Technique is a special type of cursed technique that takes cursed energy and reverses it into positive energy. It is a very complex technique and is mainly used to heal human bodies.

Description
A reverse cursed technique processes negative energy into positive energy by taking two sources of cursed energy and multiplying them by one other. As a result, the energy that destroys becomes energy that creates, and negative energy becomes positive. Despite sounding simple enough, producing reverse cursed energy is extremely complex and difficult to perform for most jujutsu users.

Reverse cursed energy can be used for various purposes, but most commonly healing. Cursed energy comes from negative emotions, which are unfit for healing living things. However, cursed spirits that are made up of cursed energy don't require a reverse cursed technique to heal. Jujutsu sorcerers use reverse cursed energy mainly for generating new flesh to heal human bodies. However, even using a reverse cursed technique to heal wounds can sometimes leave a scar. While very few sorcerers can utilize a reverse cursed technique, there are even fewer that output it to heal people other than themselves.

Cursed spirits are vulnerable to reverse cursed energy as the positive energy can compromise the integrity of their cursed energy based bodies. When reverse cursed energy is blasted directly into a curse, it compromises the structure of their body and causes them to disintegrate.

Reverse Cursed Technique can even be used to replenish one's burnt out Cursed Technique after using Domain Expansion. However, one cannot heal their body at the same time as their Cursed Technique. Healing a burnt out cursed technique requires the user to destroy the part of the brain in which cursed techniques are engraved and then heal that part with a reverse cursed technique. According to Yuta Okkotsu, that is something very risky to do even once, as displayed in his duel against Sukuna, Gojo overexerted himself using this technique to the the point that he could no longer expand his domain.

Cursed Technique Reversal
Reversed cursed energy can also be used instead of regular negative energy to power a Cursed Technique Reversal. By applying positive energy, the effects of the technique will be reversed. For example, by fueling the Limitless technique with positive energy, Satoru Gojo can bring infinity, which is normally an invisible phenomenon, into reality as a tangible explosive force.

Mechanics
The cursed energy multiplication table below represents how a reverse cursed technique creates positive energy from negative energy:

Negative x Negative = Positive Cursed Energy (-) x Cursed Energy (-) = Positive Energy (+)

Countermeasures
While cursed energy flows from the stomach, reverse cursed energy is directed from the user's brain. Therefore, an effective countermeasure for reverse cursed technique users is to destroy their head with an attack without giving them a chance to recover. Another possible counter is to poison a reverse cursed technique user. Unlike flesh regeneration, targeting a toxin and removing it requires a higher level of reverse cursed technique. Not even Uraume's reverse cursed technique was able to deal with Choso's poison.

Shoko Ieiri
Shoko Ieiri is one of few people who can use a reverse cursed technique to heal others. She is considered incredibly valuable to Jujutsu High. Thanks to her talent for utilizing a reverse cursed technique and her medical knowledge, she earned her position as the school doctor. Despite being incredibly well versed in utilizing reversed cursed energy, she has never been good at explaining how it works to others.

Ryomen Sukuna
Sukuna is capable of using a reverse cursed technique to heal himself and others. While he is incarnated in Yuji Itadori's human body, so he mainly uses reversed cursed energy to restore it. In order to push him to making a Binding Vow, he removed Yuji's heart and used his ability to heal as leverage. After they agreed on terms of binding vow, he healed Yuji's heart and returned him from death.

Mahito mentioned that a reversed cursed technique could revert the shape of a soul back to normal to remove the effects of Idle Transfiguration. However Jogo later refutes this, claiming that even if Sukuna was capable of using Reverse Cursed Technique on others, Mahito's Idle Transfiguration is not something that can be fixed.

When Sukuna found Megumi Fushiguro in a state of suspended death in Shibuya, he used a reversed cursed technique to heal him and ensure Megumi survived. After he is incarnated in Megumi's body and his arms are severely damaged by Satoru Gojo's Purple with 200% cursed energy output, he used reverse cursed technique to restore his arms. As Satoru pressured Sukuna with 2 consecutive Domain Expansions after proving he could destroy Sukuna's domain by keeping Unlimited Void in an extremely shrunken state to withstand Malevolent Shrine's effects, Sukuna too was forced to heal his cursed technique twice in order to avoid being defeated by Satoru's Unlimited Void.

Satoru Gojo
In spite of being the most talented sorcerer in the world with the Six Eyes, Satoru Gojo as a first and second year jujutsu high student was always unable to grasp the complex nature of reverse cursed technique. He was completely unable to unleash the Cursed Technique Reversal: Red, failing to activate it in a fight during the Star Plasma Vessel Escort mission as a student.

After being nearly killed by Toji Fushiguro, Satoru tapped into the core of cursed energy and awakened the true powers of the Limitless. This allowed him to utilize a reverse cursed technique for the first time, restoring himself from a near-death state. Applying this same concept to his Limitless technique, Satoru was able to unleash Red on Toji in their rematch.

As a third year student, Satoru further mastered the Limitless and learned to use a reversed cursed technique constantly running through his body in order to preserve his brain while his technique is active.

As displayed in his fight with Sukuna, Satoru can use reverse cursed technique on max output to survive even a domain expansion of Sukuna's level. Satoru healed as quickly as the rapid-fire slashing attacks injured him but this was an inefficient tactic within a domain. He healed himself while fighting Sukuna to escape the domain, even utilizing Simple Domain while using reverse cursed technique to protect himself from the attacks for some time while healing himself. After his first Simple Domain was destroyed, Satoru used the technique again and chose to abandon healing himself in favor of using a reverse Cursed Technique to replenish his burnt out innate technique. This proved fruitful and Satoru restored his cursed technique in time to counterattack with Red, giving him enough time to heal once again. As he repeatedly clashed his domains with Sukuna, Satoru used Reverse Cursed Technique to replenish his burnt out cursed technique again and again in order to be able to cast Unlimited Void once more, but the combined strain of destroying the part of the brain where cursed technique are engraved and then healing the area with reverse cursed technique along with the enormous precision and cursed energy required to use his Domain Expansion proved too much after the fifth time, causing him to nose-bleed and collapse to the ground briefly.

Yuta Okkotsu
Yuta Okkotsu learned to utilize a reverse cursed technique early on in his tenure as a jujutsu sorcerer. This was due to Rika Orimoto's tremendous levels of cursed energy and her ability to unconditionally copy techniques. Yuta first utilized it to heal Maki Zenin, Toge Inumaki, and Panda all at the same time after they were injured by Suguru Geto. Suguru was highly impressed that Yuta was able to use a reversed cursed technique after only recently becoming a sorcerer. Even after releasing Rika from her curse, Yuta retained the ability to use a reverse cursed technique and has become highly efficient in doing so. Yuta possesses the rare ability to output reverse cursed energy. Like Shoko, this allows Yuta to heal others, something not even Satoru Gojo can do. In addition, Yuta has the unique ability to apply reverse cursed energy to his attacks as well.

When tasked to execute Yuji Itadori, Yuta was able to avoid permanently killing him by instantaneously healing him with a reverse cursed technique the moment his heart stopped. He was able to trick the higher-ups into thinking it was a real execution because not many people know Yuta can take reverse cursed energy as is and apply it to others. He is also able to heal poisoned victims which requires more precise skills, this is shown when he healed Naoya Zenin in exchange for informing the higher-ups that Yuji was executed.

Up against Kurourushi in the Sendai Colony, Yuta knew he could exorcise the curse by driving reverse cursed energy into its body. Positive energy will compromise a body made of cursed energy regardless of how powerful that cursed spirit may be. However, using a reverse cursed technique is a rare ability and Yuta did not want to reveal it during the fight with other Culling Game players watching his moves. He only resorted to using reverse cursed technique when his life was in danger to destroy Kurourushi. He bit the cursed spirit's face and delivered a mouth-to-mouth blast to its brain, completely compromising the integrity of it's body.

During his fight against Ryu & Uro, two very powerful incarnated sorcerers, Yuta was forced to use his reverse cursed technique constantly when faced with the powerful attacks of his opponents. However, the high cursed energy and stamina cost of using his reversed cursed technique repeatedly caused Yuta to "bottom out", forcing him to summon Rika's full power in order to continue fighting.

Uraume
Uraume is capable of using a reverse cursed technique to heal themself. After being shot through the hand by Choso's Piercing Blood, Uraume used a reverse cursed technique to instantly repair the hole in their hand. Kusakabe immediately noticed this and assumed Uraume was on another level based on their ability to use an innate technique and a reverse cursed technique. Despite their healing however, Uraume was unable to remove the poisonous effects of Choso's blood from their body.

Iori Hanezoki
Iori Hazenoki's cursed technique requires him to remove his own body parts to detonate them. He uses a reverse cursed technique continuously to replenish his flesh, mainly teeth, and eyes that he uses as explosive projectiles.

Kinji Hakari
Hakari never learned to use reverse cursed technique on his own. The bonus provided from hitting the jackpot in his Domain Expansion: Idle Death Gamble grants him four minutes and eleven seconds of unlimited cursed energy. The overflowing cursed energy in his body during this time causes Hakari's body to reflexively heal in order to prevent permanent damage. Hajime Kashimo blasted Hakari's arm off with a bolt of lightning and the latter was able to regrow his arm just a few seconds later. This effectively means that Hakari is unkillable during the jackpot bonus. This reverse cursed technique is so advanced that it can automatically start the process of healing while the damage is occurring at the same time and able to remove toxins from the body.

Kenjaku
Kenjaku is capable of using reverse cursed technique to heal himself and others. He healed Suguru Geto's body of wounds sustained from Yuta and Gojo before transplanting his brain into it. Then he healed the scars from that procedure with reverse cursed technique as well. While possessing Geto's body, Kenjaku healed his shattered arms after they were broken by Yuki Tsukumo.

Kenjaku can utilize cursed technique reversal with great proficiency as well. By applying the positive energy from reverse cursed technique to Antigravity System, Kenjaku can reverse the effect and intensify the force of gravity around him.

Trivia

 * The Sword of Extermination is imbued with "positive energy" similar to reverse cursed energy.

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