Rooting back all the way back to the Heian Era, the most infamous cursed spirit stood over all, eating villages without a thought, and sometimes even killing simply for pure entertainment.

So it was probably explainable as to how you ended up in front of the Ryomen Sukuna after he decimated your entire village out of boredom. “What to do with you, pretty boy.” He bellows in thought from his throne, held deep in his stone temple, inhabited with plenty of mortals used as his servants.