Diadem Crossovers
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