One plot could be that Viper has a spell that can control minds, and she uses it on some of the Hogwarts students. Harry Potter discovers this and tries to find a way to break the spell. Loki, being the mischievous one, initially seems to be helping Viper but then has a change of heart and joins Harry to save the day.
Here's another idea. A powerful artifact is lost that can open portals between different dimensions. Harry Potter, Loki, and Viper are all after it for different reasons. Harry wants to keep it safe to protect his world, Loki wants to use it for his own amusement or power gain, and Viper wants to use it to bring chaos. Their paths cross as they search for the artifact, and they have to decide whether to work together or against each other.
A really unique plot would be if there was a magical tournament that included different realms. Harry Potter represents Hogwarts, Loki represents Asgard, and Viper represents some dark underworld. They all compete in various challenges, and along the way, they form unexpected alliances. Harry might learn some new skills from Loki, and together they try to outwit Viper in the tournament.
Well, in some fanfictions, Loki might be interested in the Time - Turner device from the Harry Potter universe. He could try to use it for his own purposes, like going back in time to change certain events in the wizarding world to his advantage. Or perhaps Loki and Harry Potter get into a magical duel where Loki uses his Asgardian magic and Harry uses his wizarding spells. The contrast between their different forms of magic would be really interesting to explore in a fanfiction.
Sure. One interesting fanfiction might be where Harry Potter meets Loki in a magical realm. Maybe Loki uses his trickery to play pranks on the Hogwarts students, much to Harry's amusement or annoyance. As for Viper, she could be introduced as a new dark force that both Harry and Loki have to deal with.
Well, a plot could be Loki disguising himself as a Hogwarts student. He gets involved in the house rivalries and eventually meets Harry. They start off as adversaries but then realize they both have a common goal of protecting the wizarding world from a hidden danger. For example, an ancient evil that is about to be awakened. Loki could use his Asgardian knowledge and Harry his wizard skills to defeat it. Also, Loki could be interested in the magic of the wizarding world and want to learn more, leading to some humorous and interesting interactions with the Hogwarts professors.
In 'Loki adopts Harry Potter' fanfiction, it could be that Loki adopts Harry due to some sort of prophecy. Loki realizes that Harry is crucial in a much larger plan involving both the wizarding world and the Nine Realms. So, he takes Harry under his wing. He might train Harry not only in magic but also in strategy and deception. Harry could then use these skills to form alliances within the wizarding world that were previously unthinkable, like getting the Slytherins to side with him against Voldemort by using Loki - inspired tactics.
One idea could be that Fem Loki, being a mischief - maker, gets transported to the Harry Potter world and decides to play pranks on the Hogwarts students. She might turn the Quidditch pitch into a giant ice rink just for fun.
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.
A third plot idea is that fem Harry Potter is actually a long - lost relative of Loki in some convoluted way. This discovery leads to a series of events where they have to work together to uncover the truth about their shared heritage. Along the way, they face opposition from both the wizarding community who fear her newfound connection and some Asgardians who don't trust an outsider.
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.