A very interesting plot idea could be that Harry and Lily's souls are somehow connected in a way that allows them to communicate across time and space. They then use this connection to exchange knowledge and skills to defeat a common enemy. Another plot could involve an enchanted object that binds Harry and Lily's fates together, and they must figure out how to break the curse while also dealing with the challenges in the wizarding world.
Well, some fanfictions might have a plot where Lily is brought back to life in Harry's time. This could lead to a whole new set of adventures as they both deal with the modern wizarding world that is so different from what Lily knew. Also, there could be a plot where Harry discovers a hidden magic within himself that is directly related to Lily, and they have to explore that connection to save the wizarding world.
One unique plot idea could be a time - travel scenario where Harry goes back in time and has to work with Lily to prevent Voldemort's rise without changing too much of the future. Another could be an alternate universe where Lily survives and she and Harry have to face new threats together.
One unique plot idea could be that Lily Evans is somehow able to communicate with Harry through a special magical object. For example, a mirror that was enchanted by Lily long ago. This could allow her to give him advice and guidance during his adventures at Hogwarts. Another idea is that Lily's ghost lingers in a way that only Harry can see, and she helps him uncover secrets about the wizarding world that were lost over time.
One idea could be Lily Luna Potter discovers a hidden spellbook that once belonged to Harry Potter. She starts to experiment with the spells inside and accidentally opens a portal to a parallel magical world. There, she meets a younger version of Harry Potter and they have to work together to find a way back home while also facing the new and strange magical threats in that world.
Perhaps in this fanfiction, there could be a group of magical bats that are guardians of an ancient Hogwarts secret. Harry, as he befriends them in his bat form, gets drawn into this mystery. These bats could have their own language and culture that Harry has to learn. For example, they might communicate through a series of ultrasonic sounds that only a bat - like Harry - can understand. This could lead to a whole new adventure for Harry, separate from the main battles against Voldemort but still relevant to the overall protection of the wizarding world.
One unique plot idea is time - travel. For example, a character going back in time to change a crucial event in the wizarding world. Another is the idea of a Muggle - born wizard creating a new form of magic that combines Muggle technology and wizardry. And there are also stories where characters from different Hogwarts houses have to team up in unexpected ways to face a common threat.
A plot idea could be that a group of Hogwarts students accidentally travel to the Avatar world. They are then forced to learn bending in order to survive and find their way back home. Along the way, they discover that there are some similarities between magic and bending, like how both require focus and discipline.
Perhaps a fanfic where Lily Potter's spirit is able to communicate with Harry Potter during his difficult times at Hogwarts. She gives him advice and guidance that helps him through his struggles, like dealing with Snape's complex feelings towards him, or facing the challenges of the Triwizard Tournament. This would add an emotional and magical element to Harry's journey.
One plot idea could be that Lily's presence changes Harry's upbringing completely. Instead of growing up with the Dursleys, he has a loving home with his mother. Maybe she starts teaching him magic early on, which gives him an edge when he enters Hogwarts. This could also lead to a different dynamic with his friends, as he might be more confident and skilled from the start.
One common plotline is time - travel. For example, Harry might go back in time and interact with Lily Potter in a way that changes the course of events. Another could be an alternate universe where Lily survives and she and Harry have a different kind of relationship, perhaps more of a mentoring one.
One idea could be a story where Harry and Lily Luna Potter time - travel together. They could go back to the time when the Marauders were at Hogwarts and have all sorts of adventures, like helping Sirius and James avoid getting into trouble with Snape. Another plot could involve them facing a new dark wizard threat in the future. Lily Luna could show her own brand of magic, different from Harry's but equally powerful, as they team up to defeat the enemy.
One idea could be that Harry discovers the truth about his parentage early on. This changes his relationship with Dumbledore as he realizes Dumbledore had been keeping this big secret from him. He might also struggle with his identity, feeling torn between the Gryffindor ideals he was raised with and the Slytherin traits he might inherit from Snape.