Chapter I: I am Sukuna.

Author's note: I like the Black Clover universe and I appreciate Sukuna who is an amazing antagonist so I wanted to combine the two.

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Author's POV.

During a freezing winter night in the village of Hage, one could see the shadow of a wounded man carrying a baby in his arm.

"I'm sorry for being a father unable to protect his wife and for giving you such a deformed body," he mumbled with irregular breathing.

After an unknown amount of time, the man finally reached the village church despite his body having reached its limit.

"Be strong Sukuna, even if you can't understand me now I will pray to the gods for my wish to be heard by them," he mumbled moving away from the dazed baby left at the door.

"I have to leave this village as soon as possible, or they will find him," he thought trying to strengthen his will to run faster towards the forest.

Shortly after his departure, a man came out of the church undoubtedly attracted by the cries of the baby who was left at the door.

"My God, why recently are so many people getting rid of newborns?" he said, shaking his head sadly.

"Come here you, you must be cold," the moment he took the child in his arms, the man who seems to be the father in charge of the church was able to better see his appearance concealed by the fabrics.

"My God, why did you give such an appearance to one of your children?" he said shocked by the child's unique appearance.

"it's not just his appearance but also his aura that is strange" he says, surprised but still a little scared.

"I can say that it is not mana but something else" they conclude by analyzing the aura of the newborn.

"No, I won't do like his irresponsible parents," he said, rejecting any doubt or fear towards the strange child and carried the deformed baby in his arms to bring him into the church.

"So this winter, I have three orphans in my church," he thought, placing the baby next to two others.

"There is Asta, Yuno and you are??" he said looking at his clothes to see a name.

"Ryumen Sukuna huh, that's a peculiar name," he said watching the baby who had become silent since entering the church.

"You three may have been abandoned but know that this will be your new home," he said with a gentle smile on his lips watching the three babies side by side.

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Author's POV (5 years later)

"Lacerations," said an immature, cold voice.

As soon as these words were spoken, the trees and trees behind it in front of the boy were felled without any resistance, leaving traces of cuts on the remaining trunks.

"I wonder when I will be able to reach the level of the original Sukuna," he said with an indifferent face that is strange on a young child like him.

It's been 5 years since Nagumo Hajime the simple office worker was reincarnated by a cosmic being into the Black Clover universe. The reason is that his death was premature and fortunately for him, he was able to obtain the legacy of a random individual who was Sukuna from JJK.

(Author's note: I say Sukuna but you have to understand that it's a Sukuna with all the abilities he has at his peak, so with the abilities of Megumi included)

"That was Cleave, now I have to test the current power of Dismantle," he said aiming at a nearby rock.

"Let's try making small squares," he thought, focusing his intention on his Technique.

And as expected, the rock became small squares but so did the trees behind it, young Sukuna remained indifferent after deploying his Technique.

"I knew I wouldn't get all of Sukuna's powers right away but..." he thought frowning.

"I'll see if I can deploy my domain," he said making hand signs that seemed familiar to him.

The feeling was strange but familiar and the words flowed naturally from his mouth as if he were the real Sukuna.

"Domain expansion: Malevolent Shrine ," he said calmly but his voice seemed to resonate extremely far.

After these words, a large quantity of cursed energy gathers in Sukuna to facilitate the appearance of a perverted and demonic-looking Buddhist sanctuary which seems to have imposed itself on the space itself.

It was tiring to maintain, but fortunately Sukuna had just anticipated that his domain would not be able to cover 200meters like his original but only 50 meters.

"My current strength must be around 7 or 8 fingers," he thought, estimated his strong using the memory of the original Sukuna .

Sukuna was able to destroy Shibuya with enormous ease thanks to his domain and currently having it give Nagumo Hajime some confidence in his future.

Nagumo Hajime was told that he would inherit Sukuna's memory and his experiences, but he could not gain his full power directly.

"The cosmic being told me that the stronger my soul, the more access I would have to Sukuna's power," he remembered their conversation.

"He advised me to strengthen my body by various means such as physical training. He even made sure to remind me that the soul and the body are one in the Jujutsu Kaisen universe," he concluded before taking off his clothes to start his physical training.

From the moment he inherited the memories of Ryomen Sukuna, Nagumo Hajime the simple office worker could not settle for an ordinary life.

This option was unavailable to him, even inconceivable.

He wanted to be at the top and truly experience the feeling Sukuna must have felt being at the top of humans and cursed spirits.

"I can achieve my goals, I have enough time to reach at least the 15 finger level before Asta can leave the village of Hage," he thought, diving into the lake.

Back on Earth, a friend informed him that swimming is more effective for cardio than running so he preferred to start with that for his physical training.

"Too bad I don't have a gravity machine but I have this lake and the water pressure combined with the lack of air will be enough for now," he mentally said during the swim.

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After his physical and jujutsu training combining his modern knowledge and Sukuna's, he decided to return to the church as it was getting late.

"I hurt everywhere, honestly the martial arts of the Heian era are really something else," he said as he walked using his cursed energy to help.

Throughout his physical training, he did not use his cursed energy since he and Sukuna are perfectly aware of the power that a human can achieve without this supernatural energy.

" maki zenin seems to have left a good impression on sukuna"he thought entering the church.

"Where were you?" asked Sister Lily frowning probably because of the time.

"I was really worried, it's not like if you can disappear without saying anything," she said taking him back into her arms.

She and the orphanage members are the only ones not afraid of Sukuna's appearance or repulsed by him.

"Having 4 eyes and weird tattoos and no money doesn't seem to be appreciated in this village," he thinks as he returns Sister Lily's hug.

"I must also say in my defense that I never had permission to go out before today," Sukuna expressed calmly, still in her arms.

"I understand but let me know next time if you're going out, okay? " She said in a low voice.

Sukuna nodded to show his approval as he left Sister Lily's arms.

"Where are the others?" he asked entering the orphanage.

"Asta went to train to be the wizard king and Yuno left with The father Orsi to ask the village chief for donations," she said, setting the table probably for dinner.

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Author's note: I finally wrote it and I hope not to make the mistakes made in previous fanfics with this one.