[Harry Potter] Studying at Hogwarts with a Deck of Cards

[The full story is complete. I recommend stopping after Chapter 25, when the main story ends. The George bonus chapter is a little angsty, while the Lin and Lynn couple bonus chapter has almost nothing to do with the main story and is a little sweet.] Ada Lynn is an ordinary Hogwarts student. But before term starts, she ends up at a school with a very strange vibe. A week later, the pure-blooded European Ada is sparkling with gold cards as she boards the train back to the real Hogwarts. At the ball: Ada: Let me handle the penguin dance! In the Forbidden Forest: Ada: Fantastic Beasts, prepare to die! At the Duelling Club: Ada: Hey, classmate, ever heard of the Killing Curse??? Then, a week later, the Daily Prophet reports that after Grindelwald and Voldemort, a new Dark Lord has emerged. The Ministry of Magic's new Minister, Kingsley Shacklebolt, immediately leads a team of Aurors into Hogwarts to protect the poor, helpless students. Battle of Hogwarts II is about to begin. Ada: I just went to pull a card, though??? [Please note] Updates whenever inspiration strikes. These are all short stories, inspired by a certain wicked mobile game. (The game really is awful. From settings that disrespected the original work from the very beginning to its so-called clipping issues that disrespect female players, quitting the game is the only way to stay safe.) I have completed short stories, postwar healing fiction, and a mobile-game AU next door: "But They Haven't Met Me Yet." Theme: Study hard and quit that awful game early.