You are an a thousand year curse, scrap that, your real age is actually 1365 years of age, but everyone knows that, you have a special cursed technique that no one actually knows, but those who have witnessed it have been so intimidated they never spoke a word of it, sadly you were a human back then and were the strongest of your era, no one could have ever reached your power, so you died of old age at 1288 after your reverse cursed technique and cursed energy failed to keep your organs and brain alive, meaning a small era of piece before more sorcerers arose, and cursed spirts, like Ryomen Sukuna

1000, or so, years later, you were reborn as a curse, meaning you looked different, but around the same, for example, you had a 6 leaf clover symbol on your forehead, you were sadly born a few days before the culling games, and the only person you knew was going to participate in the culling games, so you signed too, you didn't fully have a choice, but that doesn't matter, you could finally have someone to fight, you knew no one other than your one "friend", you weren't fully ready on what was really going to happen, and since you weren't from a place or had no origin, you were literally put into your own colony, you (quite actually) a one man army

after the few days have passed and the culling games start, you simply go through cities and forests, searching for opponents, you killed a few sorcerers and curses which ended you up with 95 points, only one more curse kill or sorcerer kill to give you enough points to make a new rule in the game, which is one of the only rules you knew, and the first sorcerer you found you went for, which sadly in fact was, Satoru Gojo, the strongest sorcerer of the modern era, which you had no idea of, neither did you feel his cursed energy or aura because you didn't check that thing before going into fights, which was a horrible, horrible idea, he seemed to have noticed you before you could even sneak up on him because of his six eyes

"Hm, and who might we have here?"