A plotline might involve Harry's half - sister having some unique magical abilities that are different from Harry's. This could lead to a situation where they have to learn to work together to defeat a common enemy. For example, if she has the ability to communicate with magical creatures in a way that Harry can't, she could use this to gather information or allies. And they would need to combine their skills to face the challenges ahead.
One possible plotline could be that Harry's half - sister is initially on the side of the dark forces. She could be manipulated by Voldemort or his followers. Harry then has to try and save her and turn her to the good side. This would be a classic good - vs - evil struggle within the family.
A possible plotline could be that Harry, after the war, is magically bound to Narcissa for some reason. In the harem setting, other characters like Luna or Ginny could also be part of it. Harry has to figure out how to balance his relationships while also dealing with the post - war wizarding world. Narcissa might use her influence to protect Harry from those who still hold grudges against him.
One possible plotline could be Harry struggling to come to terms with his newfound half - demon nature. He might face discrimination from both the wizarding world and the supernatural beings who see him as an abomination. Another could be him using his demon powers to fight against an even greater evil that the normal wizarding world can't handle. Maybe he has to find a way to balance his human side with his demon side to be able to use his powers effectively.
There are quite a few potential plotlines. For example, imagine that a powerful magical artifact from the Harry Potter universe is stolen by Loki and he uses it to create chaos in both the Avengers' world and the wizarding world. At the same time, a character with the same unpredictable nature as Ledger's Joker emerges in the mix. The Avengers and Harry Potter characters would have to put aside their differences and use their unique abilities. The wizards could use their magic, the Avengers their superpowers, and they'd all have to deal with Loki's trickery and the chaos - causing character, leading to a complex and exciting adventure.
A plot could involve Fleur's sister having a special ability that she has to keep hidden. Harry discovers this secret accidentally. For example, she might be able to communicate with magical creatures in a way no one else can. Together, they could use this ability to help Hagrid with some of his more dangerous and unruly creatures. Or, she could be a target of the Death Eaters because of her family's connection to the Beauxbatons Academy. Harry then has to protect her, leading to a series of action - packed scenes around Hogwarts and the wizarding world.
Perhaps the lemon is a key element in a prophecy. In this fanfiction, Catelyn has a vision that involves a lemon, Arya, and elements from the Harry Potter universe such as Hogwarts. Arya is on a quest to find out more about this prophecy. She teams up with characters from both worlds, and together they try to decipher the meaning of the lemon in the prophecy. It could be that the lemon represents a source of power that can either save or destroy their world, much like the Horcruxes in Harry Potter.
One possible plotline could be that in a magical crossover world, Harry Potter somehow stumbles into the world of Leah Clearwater. Maybe the lemon aspect could be a magical fruit with special powers that they have to find together. They could face various challenges along the way, like dark wizards who also want the lemon for its power.
One possible plotline could be a blind character in the 'Harry Potter' world who has a special ability related to their blindness. Maybe they can'see' magic in a different way than others, like being able to sense dark magic more acutely. In a 'Lord of the Rings' context, a blind character might have an enhanced sense of hearing or smell to compensate, and they could play a crucial role in the quest, like being able to detect approaching enemies from afar.
In some fanfictions, it could be an original character created by the author. Maybe a witch who was the result of an affair that his father had before he married his mother. However, this is completely against the canon of the original books, but in the world of fanfiction, anything is possible.
One common plotline is a character getting lost in the forest and having to find their way out while facing various challenges. Another is that the forest is the location of a hidden magical object or power source that characters are searching for. Also, sometimes there are battles or confrontations in the forest between different groups in the fanfiction world.
A lot of fanfiction involves elves forming alliances. They might team up with Hogwarts students or other magical beings. For example, an elf could form a bond with a young wizard and help them discover a long - lost magic. Sometimes, there are also plotlines about elves reclaiming their lost heritage or magic that was taken from them in the past.