The Thirteenth Year- A Harry Potter Applyfic

For centuries, students have graduated from Hogwarts after their seventh year.

That is how it has always been.

Until the castle changes its mind.

Strange things begin happening inside Hogwarts. Staircases lead to places they never did before. Locked doors appear overnight. Spells behave differently within the castle walls, as if the magic itself has begun shifting.

Soon, a small group of students from every house is secretly chosen to stay behind for an extra year.

A year that was never meant to exist.

No one tells them why.

But the deeper they explore the castle, the more unsettling the truth becomes. Hogwarts is hiding something beneath its ancient foundations. Something tied to the four founders themselves.

And the castle seems to be watching them.

Friendships will form where rivalries once once stood. Secrets buried for centuries will begin to surface. And not every student chosen for this mysterious "Thirteenth Year" is there for the same reason.

Because some of them are searching for the truth.

Others are trying to control it.

And if the magic beneath Hogwarts wakes completely, the castle may never be the same again.