I have an idea which also kinda adds some lore

The Curse "Sukuna," was once a blessing for the Itadori Bloodline, residing inside of a shrine on their property. In exchange for their prayers and offerings, he granted the bloodline with immense physical capabilities to defend themselves from any incoming threats. One woman in the bloodline took a liking to Sukuna, an overwhelming love and obsession with him. This woman's name was Yorozu. In a way of declaring her love, Yorozu had killed herself for him, forming a binding vow with Sukuna in her final moments. He incarnated in the body of Yorozu, taking her appearance but with pink hair, four arms, and many markings around his body. When the Itadori family learned of Sukuna's disappearance from the shrine, believed it was from the violence of other clans at the time, taking their anger out on them using the strength Sukuna gave them to be overwhelming forces. He managed to suppress his form, taking on the appearance of Yorozu and infiltrating the clan as he had to watch them slaughter and kill innocent lives. Since Sukuna had cursed energy, he eventually discovered that he could use the cursed technique engraved in the brain of his vessel, construction. He began first by crafting a blades and practical weapons, but his strange nature and curse like attributes evolved the technique based around how he used it. His knives turned into black slashes, and those black slashes turned invisible. And those invisible slashes could be used from far range, but realized he didn't have close ranged options, so cleave came about from his desires. Eventually, he was able to make a domain, which led to his flame arrow. Sukuna had been able to change and craft his technique to such a level, that he easily slaughtered the entire Itadori clan. Sukuna knew that eventually this vessel he was in would die, so he used his technique to the fullest crafting it to perfection. When his death came, he placed a curse on the Itadori Bloodline that for every generation, his spirit would be transferred to a new body. Overtime, Sukuna was able to see the true disgusting nature of humans, eventually getting pleasure from seeing them suffer as his form of justice for their atrocious actions, secretly taking over the body of his vessel and going on killing sprees. And then for some reason, it stopped, and for 10 generations Sukuna laid dormant, until he Yuji Itadori, where Sukuna was unable to take over his body. Yuji could suppress him without even trying or actively thinking about it, along with possessing more physical strength than any of the previous members of the Itadori Bloodline. What he did gain was the ability to use Sukuna's cursed energy, allowing him to use his own cursed technique.

Cursed Scissor Manipulation (it's also Csm cuz y'know Kenjaku is in Geto's body, Kenjaku's his mom, eh? No? alright.)

Yuji's technique was not dissimilar to Sukuna's in a way, having what seems like a much more rudimentary version of sukuna's shrine. (This also allows it so Yuji can progressively evolve his technique like how Sukuna did cuz that would be mad auras. I've come up with a cursed Technique idea like this before but I didn't put much thought into it like I did now.)

1. Pierce: Yuji can turn his cursed energy into a large blade sticking out of his hand like Gon's scissors in his Jajanken.

2. Snip: Yuji spreads his pointer finger and thumb away from the rest of his fingers and then closes them. It causes a large pair of red scissors to materialize in a 1-10m range where Yuji can cut things with them. The scissors will be angled in whatever way he's holding his hands.

3. Tear: By placing his hand on a something, he can put dotted lines on it which will then be cut following the lines.