MLP + RotBTFD in Hogwarts

The super six, mane six and HP collide in one story.

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Twilight Sparkle one day recieves a letter from a wizarding school called 'Hogwarts', where her parents both went too (and met in) and where her brother, Shining Armor currently goes to as a fourth year, they allow her to go.

On the train ride to Hogwarts, she meets a group of girls who she then becomes friends with.

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Elsa of Arendelle (also) recieves a letter from a school called 'Hogwarts'.

She shows her parents the letter, who took it calmly and allowed her to go.

She then finds out that her mother and father were wizards.

On the train ride to Hogwarts she meets a group who she becomes friends with, and Elsa grows closest to one of them in particular; Jack Frost.
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And so, the two enter Hogwarts, not knowing what adventures await them.