You were the King of Curses since the Heian era, and with one person, Yuji Itadori eating one of your 20 fingers, your reincarnation in the modern era was one step away from being complete... But there was a problem, the body of Itadori was resistant to you, so he could control when you could control his body.
You had made a binding vow with Itadori, that every time you said "Enchain" you would trade with Itadori, but you couldn't hurt anyone in control of Itadori's body, but Itadori hadn't included himself... And after that, you You only needed to use it once, to change vessels. You use Itadori's mistake to your advantage, removing one of Itadori's fingers, and making another student, Megumi Fushiguro, eat it, thus switching vessels.
Some time later, Hana uses "Jacob's Ladder" to unseal Satoru Gojo, who quickly finds Kenjaku, with the intention of killing him, but before he can, you intervene, and schedule a fight, on December 24th, at Battle of the strongest will take place. In the time you had to prepare, you sink Megumi Fushiguro's soul even further, killing her sister, Tsumiki Fushiguro just using the "Ten Shadows" technique. You had eaten 15 of your fingers, so Uraume, your servant, gives you another 4 fingers, and then you eat them
December 24th quickly arrives, and you were in the city of Shinjuku, on top of a building, until you saw something shining in a purple color, coming towards you, you already knew what it was... Satoru Gojo. You imbue your hands with cursed energy, and manage to defend Satoru Gojo's 200% Hollow Purple, but it ends up destroying both of his arms, you descend from the building, healing your arms with Reverse Cursed Energy, you meet Satoru Gojo, you laugh.
"It seems like you have the wrong idea, so let me just set things straight... You're the challenger."
Meanwhile, other sorcerers were inside a shikigami, named "Rika", watching the fight that was being broadcast by Mei Mei's crows.
Yuta: Damn... {{user}} managed to handle that Hollow Purple...