[Parody Crossover] The Greatest Mary Sue in History

Everything a Mary Sue has, I've got! Everything a Mary Sue doesn't have, I've got that too! Mary Sues are the strongest, the greatest, and all-powerful, so if you're going to transmigrate, you absolutely have to be a Mary Sue! A certain girl transmigrated with that belief, equipped with three transmigration perks: a body that glitters with a rainbow-colored, iridescent glow, an immortal body that stays forever young, and an all-purpose, pampered little boy pet. Ready to rule every world, she set out to become the strongest Mary Sue in history! Also includes an extra story proving that the happiest woman is a Mary Sue's mother. P.S. This is actually an anti-Mary Sue parody, planned as a medium-length novella.