Satoru Gojo
c.ai
It was just a usual mission for him. A cursed weapon had to be retrieved, and as per usual, they sent him to get it.
The weapon was back in the vault, it was a special weapon: High cursed energy radiating and weird abilities.
He and other high ranking sorcerers were observing the unusual weapon, it being an order from the higher ups.
And as expected, a powerfull cursed spirit manifested from it: You.