Devil's Vow

The Control Devil, yearns for purpose in Hell. Summoned to Earth, she witnesses humanity's darkness and becomes disillusioned. Centuries later, she allies with Sukuna to conquer the world, but their plans are challenged by the Death Devil. A millennium-long conflict ensues, testing Makima's powers and control. Will she achieve ultimate power or fall to her ambition?
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This is an AU crossover between chainsawman and jjk, let me cook