Well, one interesting plot could be the internal struggle of the son. He might be torn between the dark heritage from the Dark Lord and the good influence of Harry Potter's world. Maybe he has to hide his true identity while trying to figure out his own moral compass.
One interesting plot could be the discovery of long - hidden dark magic spells within Hogwarts. Maybe a character stumbles upon a secret chamber filled with forbidden knowledge.
One interesting plot could be the formation of an unexpected alliance within the Dark Brotherhood in the Harry Potter universe. For example, a character who was initially thought to be on the side of good might be forced to work with the Dark Brotherhood due to some dark magic threat that only they seem to have the knowledge to combat. This could lead to a lot of internal conflict as the character struggles with their own moral compass while trying to survive in this new and dangerous situation.
One interesting plot could be the exploration of the dark underbelly of the wizarding world economy in fanfiction. Maybe how certain dark artifacts are traded on the black market and how it affects the overall power balance among wizards.
In some fanfictions, there could be a plot where Harry, as the son of Hestia, has to face opposition from traditional wizarding families who don't accept this new 'parentage'. This would lead to him having to prove himself not only as a powerful wizard but also as a worthy heir to Hestia's legacy. He might have to use his wits and newfound powers to overcome these prejudices.
Well, in some plots, Harry might have special powers related to the moon. Maybe he can communicate with lunar spirits or use moonlight for magic in ways not seen in the original books. For example, he could use the moon's energy to enhance his Patronus charm, making it even more powerful against Dementors.
Well, in some of these fanfictions, there could be a plot where Harry discovers new magical abilities passed down from this 'G' figure. Maybe he can control a unique type of magic that no one else in the wizarding world has ever seen. This new ability might put him in a position where he has to face new enemies or challenges.
Perhaps a plot where Harry, as the son of Malfoy, discovers a hidden prophecy that links him to the downfall of Voldemort in a completely different way than in the original series. This could involve him using his knowledge of the Malfoy family secrets and connections to gain an advantage over the Dark Lord.
One possible plot is that Harry, as the son of Nyx, has to face off against a new enemy that is specifically targeting him because of his connection to Nyx. This enemy could be an ancient being that has a vendetta against Nyx and sees Harry as a way to get revenge. Along the way, Harry would have to learn more about his mother's (Nyx) powers and how to use them effectively, all while still dealing with the normal Hogwarts stuff like classes and friendships.
Well, one interesting plot could be Harry's struggle with his new identity as the son of Fenrir. He might have to deal with the stigma associated with Fenrir being a werewolf. Another plot could involve his relationships with other characters changing. For example, some friends might be afraid of him, while he tries to prove he's not like his father.
One interesting plot could be Harry discovering new and unique magical abilities that are not part of the original series. For example, he might be able to communicate with magical creatures in a more profound way. Another plot could involve Harry having a different family background that changes his relationships with other characters. Maybe he has a long - lost relative who is a powerful wizard from a far - off land, and this relative comes to Hogwarts to teach him some ancient magic. A third plot could be Harry being involved in a time - travel adventure within the wizarding world, where he has to fix some past mistakes that are affecting the present state of magic.