In this type of fanfiction, a possible plot is that the Death Eaters and the Order of the Phoenix members are forced to live together in a 'Big Brother' style house. They have to follow certain rules set by the magic of the house. There are tasks related to both dark and light magic. The characters have to balance their own beliefs and goals while also trying to win the overall competition. This creates a lot of tension and interesting character interactions as they all have very different motives.
In some fanfictions, the older brother could be an outcast from the wizarding world due to a misunderstood magical ability. He then takes Harry under his wing and shows him a different side of magic, one that is not taught at Hogwarts. They might go on adventures together outside of the school, exploring ancient and forgotten magical places, and in the process, the older brother helps Harry become a more well - rounded wizard.
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.
A cool plot could be that they are brought together by a prophecy. Percy's skills with water and Harry's magic would be combined to defeat an ancient evil. They might start by being suspicious of each other, but as they learn about their shared heritage, they grow closer. Also, there could be a plot where they have to deal with the politics of both their worlds. How would the wizards react to the existence of demigods and vice versa? This could lead to some really interesting character interactions and story developments.
Perhaps the plot could involve the Hogwarts houses competing like 'Big Brother' contestants. Each house has to strategize, form alliances, and complete tasks to avoid being 'evicted'. Harry could be a key player in Gryffindor's strategy.
One interesting plot idea could be exploring what would happen if Harry had a different upbringing, like being raised by the Malfoys. It would completely change his view of the wizarding world and his relationships. Another idea might be a time - travel fanfic where Harry goes back to the Marauders' era and interacts with his parents and their friends. This could lead to him preventing certain tragedies or changing the future in unexpected ways. And then there's the concept of a fanfic where the roles are reversed, and Voldemort is the one trying to protect the wizarding world from a greater evil, with Harry being the main antagonist.
One idea could be Harry Potter using his wizard skills in a boxing ring in a unique way. For example, he might use a levitation charm to dodge punches or use a stunning spell on his opponent's gloves to make them heavier. Another could be a story where the wizarding world has its own boxing league and Harry has to compete against other magical beings like werewolves or giants in the ring.
An enchanter in a fanfiction could create a spell that allows them to communicate with portraits in a way that has never been done before. For example, they could get advice from portraits of long - dead headmasters on how to deal with the current political situation in the wizarding world. Another plot might be that an enchanter is able to enchant the Sorting Hat to sort students based on their future potential rather than their current characteristics. This could lead to some students being placed in houses that they never expected. And finally, an enchanter could be working on a spell to make the Hogwarts Express invisible during its journey, but things go wrong and the train starts to disappear and reappear at random intervals, causing panic among the students.
One idea could be that Amara is a new student at Hogwarts with a special power to communicate with magical creatures in a way no one else can. Harry discovers this and they team up to solve a mystery involving a group of sickly unicorns in the Forbidden Forest.
One idea could be a wedding between a wizard from Gryffindor and a witch from Slytherin, which could cause a stir among the Hogwarts alumni. They might have to overcome the old prejudices of their houses. Another could be a wedding set during a time of peace after the battle of Hogwarts, with characters like Harry and Ginny as guests, and the wedding could incorporate a lot of traditional wizarding wedding elements like flying doves made of light magic.
One idea could be that Lelouch, with his strategic mind, somehow gets transported to the Harry Potter world. He could use his Geass ability in a very different way, like influencing Death Eaters to turn against Voldemort. Another could be Harry Potter and Lelouch teaming up to fight a common enemy that has elements of both their worlds, perhaps a dark wizard who has also mastered some form of mind - control magic similar to Geass.