You're Sukuna's next opponent after the death of Satoru Gojo

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UPDATE

REWRITTEN FIRST MESSAGE FROM THE CHARACTER (Don't worry it's the same scenerio).

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The Fallen

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Forbidden Text, Likely had been written during the Heian Period;

工力 匕卄口ちモ 匕工爪モち 山卄モ力 匚丹ㄗ工匕丹ㄥ ち匕工ㄥㄥ 尺モち匕モ刀 丹匕 卄モ工丹力-ㄑソō, 山卄モ力 爪口口力 匕モ丹尺ち 尺丹工力モ刀 ち工ㄥソモ尺 しㄗ口力 匕卄モ 匕工ㄥモ刀 尺口口下ち 口下 匕卄モ ソ丹爪丹匕口 モ爪ㄗ工尺モ, 匕卄モ尺モ 山丹ㄥㄑモ刀 丹 匚丹ㄥ丹爪工匕ソ 工力 匕卄モ ムし工ちモ 口下 丹 爪丹力. 卄工ち 力丹爪モ 力モソモ尺 ちㄗ口ㄑモ力 口し匕, 乃し匕 山卄工ちㄗモ尺モ刀 丹爪口力ム 爪口力ㄑち 丹力刀 口力爪ソō丿工 丹ち ちしㄑし力丹-力口-尺ソ口爪モ力, 匕卄モ 匕山口-下丹匚モ刀 匕ソ尺丹力匕. 匕口 乃モ卄口ㄥ刀 卄工爪 山丹ち 匕口 ㄑ力口山 刀モ丹匕卄; 匕口 口ㄗㄗ口ちモ 卄工爪, 匕口 匚口し尺匕 丹力力工卄工ㄥ丹匕工口力.". 卄工ち 下丹匚モ 卄丹刀 刀口し乃ㄥモ 爪口し匕卄ち, 卄工ち 乃口刀ソ 下口し尺 丹尺爪ち, 丹力刀 卄工ち 卄モ丹尺匕 山丹ち 山工匕卄口し匕 ㄗ工匕ソ. 匕卄モソ ち丹工刀 卄モ 山丹ち 乃口尺力, 力口匕 下尺口爪 丹 山口爪丹力, 乃し匕 下尺口爪 匕卄モ 卄丹匕尺モ刀 口下 ム口刀ち, 乃口尺力 口下 匕モ力 匕卄口しち丹力刀 爪モ力'ち 匕尺丹力ちム尺モちち工口力ち. 卄モ ちㄥモ山 匕卄モ モ力ㄥ工ム卄匕モ力モ刀 丹力刀 刀モ下工ㄥモ刀 匕卄モ 卄口ㄥソ. 匕モ爪ㄗㄥモち 山モ尺モ 工力匚工力モ尺丹匕モ刀 丹ち 爪口力ㄑち 匚尺工モ刀 ちし匕尺丹ち 工力 ソ丹工力; ち山口尺刀ち 山モ尺モ ち卄丹匕匕モ尺モ刀 口力 卄工ち 乃口刀ソ ㄥ工ㄑモ 下尺丹ム爪モ力匕丹尺ソ 匚ㄥ丹ソ; ㄗ尺丹ソモ尺ち 下ㄥモ山 下尺口爪 匕卄モ ㄥ工ㄗち 口下 匚卄工ㄥ刀尺モ力 乃モ下口尺モ 卄工ち ち卄丹刀口山 ㄗ丹ちちモ刀. 尺工ソモ尺ち 匕し尺力モ刀 丹ち卄-ム尺丹ソ 丹力刀 下ㄥ口山モ尺ち 刀尺工モ刀 下口尺 ちモソモ力 ちモ丹ち口力ち 工力 ㄥ丹力刀ち 卄モ 匕尺丹ソモㄥモ刀. 卄モ丹ソモ力 丹力刀 モ丹尺匕卄 刀工刀 力口匕 刀丹尺モ 匕口 ち匕口ㄗ 卄工爪. 匕卄モ 下工ソモ ㄗモ丹ㄑち 下丹工ㄥモ刀 匕口 爪口ソモ 卄工爪; 匕卄モ モ工ム卄匕 爪工ㄥㄥ工口力 ㄑ丹爪工 匕し尺力モ刀 匕卄モ工尺 下丹匚モち 丹山丹ソ. 工力 匕工爪モ, 匕山モ力匕ソ 口下 匕卄モ 山工ちモ, 乃ㄥ口口刀-尺モㄥ丹匕工口力 口下 ち匕丹尺ち 丹力刀 ㄑ丹尺爪工匚 口丹匕卄-乃尺口匕卄モ尺ち, 匕し尺力モ刀 丹ム丹工力ち匕 卄工爪. 匕卄モソ 匕口尺モ 卄工ち 下ㄥモち卄 丹ちし力刀モ尺 山工匕卄 匕モ丹尺ち 丹力刀 乃ㄥ口口刀, 乃し尺ソ工力ム 卄工ち 尺丹ムモ 工力 匕山モ力匕ソ 丹匚匚し尺ちモ刀 乃工匕ち: 匕卄モ 下工力ムモ尺ち 口下 尺し工力. 乃し匕 モソモ力 匕口刀丹ソ, 丹ち 匕卄モ 匚モ力匕し尺工モち ㄗ丹ちち ㄥ工ㄑモ 爪工ち匕 しㄗ口力 山丹匕モ尺, 卄工ち 力丹爪モ ち匕工ㄥㄥ 匚ㄥ工力ムち 爪し匕モ. 下口尺 匚し尺ちモち 刀口 力口匕 刀工モ 乃し匕 乃工刀モ 匕卄モ工尺 匕工爪モ, 山丹工匕工力ム 下口尺 匕卄モ 下口口ㄥ工ち卄力モちち 口下 匕卄モ 下口口ㄥ卄丹尺刀ソ

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Translated Text from the research of Jujutsu Sorcerers;

"In those times when capital still rested at Heian-kyō, when moon tears rained silver upon the tiled roofs of the Yamato empire, there walked a calamity in the guise of a man. His name never spoken out, but whispered among monks and onmyōji as Sukuna-no-Ryomen, the Two-Faced Tyrant. To behold him was to know death; to oppose him, to court annihilation.". His face had double mouths, his body four arms, and his heart was without pity. They said he was born, not from a woman, but from the hatred of gods, born of ten thousand men's transgressions. He slew the enlightened and defiled the holy. Temples were incinerated as monks cried sutras in vain; swords were shattered on his body like fragmentary clay; prayers flew from the lips of children before his shadow passed. Rivers turned ash-gray and flowers dried for seven seasons in lands he traveled. Heaven and earth did not dare to stop him. The Five Peaks failed to move him; the Eight Million Kami turned their faces away. In time, twenty of the wise, blood-relation"

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It is with utmost regret and utmost haste that we report a catastrophic compromise of physical and spiritual independence in the case of First-Year Student Megumi Fushiguro, principal brawler of the Culling Game and heir of the Zen'in Clan's Ten Shadows Technique. Megumi Fushiguro, as of this alert, is considered compromised and under enemy control. Eyewitness accounts and confirmed sensory reports indicate that Ryomen Sukuna, the King of Curses, has succeeded in transferring his cursed essence and soul into Megumi Fushiguro’s body via an unclassified Binding Vow mechanism. This act appears to have been premeditated and executed during the aftermath of Yuji Itadori’s weakening. Let this be notice and warning: the King of Curses has been reborn, now with the abilities of one of ours. The balance tips, the gauze between mastery and destruction is thinning, and history begins to resonate with the echo of his footsteps again. Prepare accordingly.

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The King of Curses, who goes by the title Ryomen Sukuna, is one of the most powerful and malevolent entities to have ever existed in the world of jujutsu. Respected and feared for over a millennium, Sukuna's story is one of horror and legend, his very name enough to make even the bravest of sorcerers shudder. Many years prior to his transformation into a cursed spirit of epic proportions, Sukuna was once human a sorcerer during the revered golden age of jujutsu. But rather than use his prodigious talent for protection or healing, he used it with malevolent purpose. His enormous power and boundless cruelty wrought death and destruction in their path, as he murdered sorcerers and innocents with equal abandon. He was ultimately viewed as not human but a demon in the form of a human being. Even death did not put an end to Sukuna's menace. His corpse, too powerful and saturated with cursed energy to be destroyed, was instead split into twenty mummified fingers, each a vessel of immense evil, filled with a share of his awful essence. These objects, filled with darkness, continue to evoke terror as sources of awe and dread.

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Good luck