A possible plot could involve Harry, in search of a way to destroy Horcruxes more effectively, seeking out Nicolas Flamel with Snape's begrudging help. Flamel, being an ancient and wise alchemist, has knowledge that could potentially lead to a new method of Horcrux destruction. Along the way, Snape and Harry start to understand each other better as they face various challenges together.
For their relationships, it could be that Snape initially resents having to work with Harry in any way related to Flamel. However, as they encounter challenges together, such as dark magic threats trying to stop them from reaching Flamel's secrets, Snape realizes that Harry is more than just James Potter's son. Harry, on the other hand, begins to understand Snape's past and the reasons for his coldness. Flamel, with his long life experience, could share stories that make Snape and Harry reflect on their own lives and relationships.
In some fanfics, Nicolas Flamel might be reimagined as a time - traveling character who goes back in time to meet a young Harry Potter. He could then influence Harry's life in ways that change the course of the entire Harry Potter story.
Obviously, Harry Potter and Nicolas Flamel are essential. But also including characters like Hermione Granger would be great. Hermione's thirst for knowledge would make her a perfect student of Flamel's teachings.
A plot might involve Snape forcing Harry to train with the Invisibility Cloak in new and risky ways. Maybe Snape has discovered a way that the cloak can be used not just for hiding but also for offensive maneuvers. Another idea is that Snape forces Harry to form an alliance with some of the Slytherin students who are initially hostile towards him. This could be part of Snape's plan to unify Hogwarts against Voldemort. Also, Snape could force Harry to relive some of his parents' memories through a special magic, so that Harry can learn some long - lost secrets about his family and their role in the wizarding world.
The idea of Flamel's influence on the wizarding world is also common. His knowledge and power are so great that fanfictions may show how he affected events in the past, present, or future of the wizarding world. For example, some fanfics might suggest that he had a hand in the founding of Hogwarts or in the development of certain spells.
One plot idea could be that Snape discovers Harry has a hidden magical ability during a high - stakes potion - making class. Another could be that they are magically bonded in a strange way that forces them to understand each other's pasts. Maybe Harry finds an old diary of Snape's from his school days and it reveals a side of Snape he never knew.
One plot idea could be that while trapped, they are forced to confront their past misunderstandings. Snape might reveal some of his long - held secrets about protecting Harry all along. For example, he could disclose the real reasons behind his actions that Harry had misinterpreted for so long.
One plot idea could be Snape teaching Harry some long - forgotten dark arts defenses that were once known only to the founders. This could put Harry in a unique position in his battles against Voldemort. Another idea is that Snape reveals to Harry some secrets about his mother, Lily, that help Harry understand his family better and give him more motivation in his fight. Also, Snape could mentor Harry in potions in a more personal way, sharing his own experiences and insights which could lead to Harry creating new and powerful potions to use against the dark forces.
One popular 'Harry Potter Nicolas Flamel' fanfiction is 'The Alchemist's Legacy'. It delves into Flamel's backstory and his connection to the wizarding world beyond what was shown in the original books. It's a great read for those who want to explore more about this mysterious character.
It could be in a magical alternate universe. Maybe a place where the rules of magic are different and allow for such a transformation.