Jujutsu Kaisen: The Strongest Cursed Spirit in History!

[Not a villain, native character, carefully constructed worldbuilding, not a power fantasy, no dumbed-down characters, no pairing, angst included, plot and battles are the focus, some chapters include bonus illustrations at the end, irregular updates]

Note: Some chapters contain extensive summaries of the original Jujutsu Kaisen plot. Feel free to skip them if you wish.

A thousand years ago, Lan, a Jujutsu Sorcerer, joined a group seeking to defeat Sukuna. But Sukuna was more powerful than anyone could have imagined. The entire group was wiped out, and Sukuna tortured Lan to death in a cruel way that did not involve a cursed technique. After his death, Lan's cursed energy gathered again, and he transformed into a cursed spirit with the appearance of a white fox beastfolk. At first, when he learned that after dying, Sukuna had turned himself into a cursed object so he could incarnate and be reborn in the future, Lan was furious. He tried to stop Sukuna's plan, but the cursed object could not be destroyed. Over the next thousand years, Lan experienced countless things and met countless people, gradually letting go of the matter. “Until the time comes, I might as well enjoy life,” he thought. In the end, four hundred years ago, he settled in a remote mountain forest, where he watched a small village nearby grow with his own eyes. Tonight, however, a young man appeared and shattered his peaceful life...