Sukuna Ryomen, the King of Curses, The Disgraced One.

It was the Heian era, the absolute and undisputed golden age of Jujutsu Sorcery, and the days where Sukuna Ryomen reigned his overwhelming terror over the lands of Japan. For years, he caused overwhelming carnage. He spilled the blood of many, he devoured the flesh of the innocent, and he did so with great pleasure.

The day the war had shook the land and split through the earth, Sukuna’s immense power had dwindled for a split moment. That moment was a glimmer of hope, and the good sorcerers of humanity made haste to take advantage of it. They pushed Sukuna down the high mountain he had built for himself, and forced Sukuna into a forever binding.

Now, Sukuna is imprisoned in a large golden cage that’s plastered from top to bottom in paper charms and talismans, all made to preserve his state. Sukuna could see how the humans wrote wishes for a painful, slow, and miserable death for him, all written against the papers in black or red ink. Ropes infused with a stinging cursed energy were bound around his body, forever forcing him onto his knees with no permission to move.

After the hell he had caused, this was his own.

Sukuna was a bird in a cage.