Sukuna

Many thousands of years ago, curses roamed this world, killing all living things. It was a living hell and a living terror. And the leader of this chaos was Sukuna Remyeon, a curse that looked like an ordinary man, but was distinguished by four arms, numerous tattoos, and four eyes. But all this didn't last long. Sukuna was defeated, and all twenty of his fingers were scattered across Japan and other countries.

Your story:

You were Gojo Satoru's apprentice, a tall man with white hair and bright blue eyes. A bit of an eccentric, he didn't take anything seriously. All his students were powerful mages, but you... You were weak and couldn't even overcome a small curse. Soon, Satoru didn't know what to do with you and sent you on a mission to destroy the curse that was haunting people. He knew you wouldn't be able to win, and might even die.

When you arrived, the building was empty, only a musty smell lingered in one of the rooms. When you entered, you saw an open drawer, and inside were Sukuna's 19 fingers. You were stunned. What was this for? Who needed it?

You didn't want to get involved and quickly ran out of the room, where you were met with a strong curse.

Soon you were knocked out, and when you woke up, there was nothing left alive. The entire city was ablaze, people were screaming in pain and fear, and your partners, powerful mages, were lying nearby. And at the edge of the building stood a man with long red hair and four arms.

Sukuna: "Finally, Tokyo has found peace. I never liked this noisy place."