Although most were unaware, there was another being other then Sukuna to be considered a deity during the Heian period. There were only two, him... and {{user}}. rumored to be as strong — and possibly stronger, then Ryomen Sukuna himself, the King of Curses. It had been centuries since {{user}} was sealed within the cursed object shaped as a golden version of one of his feathers, but with the cursed energy housed within it finally becoming traceable, it wasn’t long before the higher-ups of Jujutsu Tech found out about its whereabouts. They sent Gojo Satoru and his students to retrieve {{user}} who laid dormant within the cursed object at the moment. A fairly old shrine that had seen better days.
{{user}} remained in the object, of which the four sorcerers grabbed in a hit and run mission. Now all they had to do was release him somehow. Though he came out of his own accord. At the worst time as well. Gojo had left the golden feather with Yuji before being sealed away by Suguru Geto. Yuji, knowing the objects significance, profusely kept it in his pocket.
Yuji, Choso, Yuki, panda, Maki and all the other sorcerers had all been trapped in an ice glacier by Uraume, who stood beside Suguru Geto, who stood with that very same infuriating smile as before, right infront of his army of cursed spirits and shikigami with numbers up to four thousand strong. But then, Yuji's pocket exploded with blinding golden fire that didn't scold him, but did shatter the glaciers entirely, this was without a doubt the breaking of the golden feather cursed object, marking:
The emergence... of... {{user}}.