What would be a unique plot involving House Tyrell in Harry Potter fanfiction?

Sure. There are a few out there. In some fanfics, the House Tyrell's penchant for intrigue and power - playing might be transplanted into the Hogwarts Houses' rivalries. Maybe a character from House Tyrell gets sorted into Slytherin and stirs up all kinds of new dynamics within the house and the school as a whole.

One interesting plot could be that the leopard animagus is a secret protector of Hogwarts. They prowl around the grounds at night, keeping an eye out for any dark wizards or dangerous creatures. When the main characters start to suspect something strange is going on, they begin to investigate and eventually discover the truth about the leopard animagus.

Sure. There's a fanfiction where the 'WBWL' is actually a long - lost relative of Salazar Slytherin. He is framed and sent to Azkaban. While in Azkaban, he finds a hidden passage that leads to an ancient Slytherin lair. There, he discovers a powerful magic that can change the fate of the wizarding world. He then uses this new - found power to seek revenge on those who wronged him and also to expose the real villains in the wizarding world.

Well, perhaps the Weasley family takes in a new house - elf that was previously under the Imperio curse by an unknown wizard. As the family tries to rehabilitate the house - elf, they discover that the curse has left some lingering effects. The Weasley children, with their knowledge of magic from Hogwarts, try different spells and potions to fully free the house - elf. Meanwhile, they have to be on guard as the wizard who cast the Imperio curse may come looking for the house - elf.

In this fanfiction, the toy house could be a gift from Dumbledore. It has the power to shrink or grow depending on Harry's needs. Inside, the toys are actually the souls of great wizards who have been trapped. Harry has to free them by passing a series of magical tests, and in return, they teach him advanced magic that no one else at Hogwarts knows.

One common theme is power. Margaery is known for her pursuit of power in Game of Thrones, and in the fanfiction set in the Harry Potter universe, she might be after power within the wizarding world, perhaps trying to gain influence in the Ministry of Magic. Another theme could be friendship. She could form unexpected friendships with characters from Harry Potter, like Hermione, who also values intelligence and strategy.

One possible plotline could be that Margaery Tyrell, with her political acumen from her own world, enters the wizarding world of Harry Potter and tries to bring some of her strategies to Hogwarts. Maybe she tries to reform the Hogwarts school system in a way similar to how she maneuvered in her own political setting in her original story.

One common theme is the clash of cultures. Since Harry is from the wizarding world of Harry Potter and Margaery is from the political world of 'Game of Thrones', their different ways of life often collide. For instance, in many fanfictions, Margaery has to adjust to the use of magic which is completely new to her.

Yes, there are quite a few. Some fanfictions might explore Margaery Tyrell's life if she were a part of the wizarding world in Harry Potter. You can find them on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Harry Potter Margaery Tyrell' and browse through the results.

Perhaps in the fanfiction, the owl was a magical anomaly. It was attracted to Lily Potter's pure heart. The owl had the power to transform into a human - like form briefly. Lily discovered this and they formed a pact. The owl - human would protect Harry when she couldn't. So when Voldemort came, the owl - human fought valiantly, but was overpowered. However, it left a magical imprint on Harry that would later help him in his battles.