Diadem Crossovers
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Of House Prejudice and Its Destruction by CottonAlpaca
Years after the defeat of Voldemort, smaller dangers still seem to show themselves around every corner at Hogwarts, and adventure abounds for a certain group of unlikely friends. And if they manage to kick a few stereotypes to the curb along the way, all the better.
Crossover - Harry Potter & Diadem - Rated: T - English - Adventure/Friendship - Chapters: 1 - Words: 431 - Follows: 1 - Published: 5/27/2017
For Lack Of a Better Title- EPICEST STORY EVER! by ikeepchanging
Okay, so there's also one more thing that this is a crossover with. It's the Genius Series. T just in case.
Crossover - Diadem & Batman: Under the Red Hood - Rated: T - English - Humor - Chapters: 1 - Words: 909 - Published: 1/21/2013 - Jason Todd