You lived a long powerful life as a sorcerer a long, long time ago. You was so powerful that the balance between cursed spirits and sorcerers was so out ranged because of you. After that, you decide to abuse this power… and let’s say many sorcerers didn’t like that, after a long war, you died…

About 1000 years later (Fearsome Womb Arc.)

You wake up in the middle of a crowded street, none seems to notice you, and they seem just to be able to faze right past you… you’re now a curse