Some 'Harry Potter 8th book fanfiction' might explore the idea of time travel gone wrong. Harry and his friends accidentally end up in a time where the events of the first wizarding war are repeating, but with some differences. They have to figure out how to stop it without changing too much of the past. Another plot could be that a long - lost relative of Voldemort shows up with a new brand of dark magic that the wizarding world has never seen before. And then there could be a story where the magic of Hogwarts itself turns against the students and they have to find a way to restore it to normal.
Well, in some 'Harry Potter 8th book fanfiction', a cool plot is that the magic in the world starts to fade and Harry, along with his friends, has to find the source of this problem. It could also be about the children of the main characters having their own adventures at Hogwarts, but with a new, even more dangerous threat lurking in the shadows. Maybe there's a plot where the Ministry of Magic is corrupted again and the old heroes have to step in to clean it up once more.
Another interesting plot could be that Harry's connection to Voldemort causes some strange magical disruptions during the Triwizard Tournament. These disruptions seem like accidents at first, but Harry gradually realizes they are being caused by his own dark - side related powers that are being awakened in his fourth year.
A fanfiction could also be about Harry's relationship with his parents during his fourth year. Through some magical event, he gets to communicate with their spirits or memories more vividly. This could help him understand his parents better and also give him strength and guidance for the challenges he faces in that year.
One idea could be that Harry discovers a new, hidden magical ability within himself that helps him in the final battle against Voldemort. For example, the ability to communicate with the spirits of Hogwarts founders for guidance. Another could be that the relationships between the characters take a different turn. Maybe Hermione and Ron have a huge fight early on and Hermione teams up with Draco for a while out of necessity, which changes the dynamics of the whole group. Also, Neville could have an even more prominent role, leading a secret group of students who are training in a new form of magic that they hope will give them an edge in the fight.
A plot could be that Harry has premonitions about the Triwizard Tournament tasks before they happen. These premonitions are not clear at first, but as he gets closer to each task, he starts to understand them better. It adds an element of mystery and foreshadowing to the story.
A great plot could be focusing on the love triangle between Harry, Ginny, and Hermione. Harry might struggle with his feelings for Ginny while also being really close to Hermione, and this could create some interesting drama and tension. Also, it could tie in with the events of the 6th year like the search for Voldemort's Horcruxes.
One idea could be exploring more of the backstories of the other schools' students who came for the Triwizard Tournament. For example, delving deeper into the life of a Durmstrang student and how their magic education differs from Hogwarts.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.
One idea could be exploring the lives of the victors after the games in more depth. Maybe show how they deal with the trauma and how their relationships change. Another could be creating an alternate ending to the 4th Hunger Games, where different tributes win. Or perhaps a story about a new rebellion starting from the events of the 4th book.
Well, one interesting idea could be exploring the backstories of minor characters in more depth. For example, the house - elves' lives and their own magic that is not fully explored in the original books. Another idea might be alternate endings to major events, like what if Voldemort had won the Battle of Hogwarts? It could also involve creating new spells or magical creatures unique to the fanfiction world.
A traveler could be from a different magical realm entirely and come to the Harry Potter universe. They bring with them unique magical abilities that both fascinate and frighten the wizards in the Harry Potter world. This could lead to a series of adventures where they either share their knowledge or are hunted down by those who fear the new magic they possess.