One possible plot could be that Voldemort has cast a spell that separates all the adult wizards from the young ones. So the Hogwarts students have to save themselves from the Death Eaters. Another could be a situation where a powerful magical artifact is causing chaos and the students must figure out how to stop it on their own.
The plot might involve a new threat emerging from the Forbidden Forest. The 'Save Your Selves' aspect could mean that the teachers are all incapacitated in some way. So the students, like Harry, Hermione, and Ron, need to lead the other students in finding a solution. Maybe they need to explore long - forgotten parts of the castle for a way to defeat this new threat. It could also be about a magical curse that targets the helpers, like the house - elves and the portraits, so the students are left to fend for themselves and their fellow classmates.
A possible plot in this fanfic could be that a dark wizard has created a time - distortion spell around Hogwarts. All the adults are frozen in time, and the students are the only ones aware of what's going on. They have to find a way to break the spell and save themselves from the consequences of the distorted time, like dangerous magical anomalies that are starting to appear. It could also be a story where the students are wrongly accused of a great crime and have to prove their innocence while also protecting themselves from the real culprits who are trying to silence them.
It could refer to a fanfic where the characters in the Harry Potter universe have to save themselves instead of relying on others. Maybe it's a story where they are in a dangerous situation and have to use their own skills and wits to get out of it.
One possible plot could be that the son is lost in a strange dimension that combines elements of the Harry Potter world and Loki's world. Harry Potter and Loki have to team up to find him. Along the way, they face various challenges like magical creatures from the Potterverse and Loki's enemies. The son, when found, might have developed some unique powers that are crucial for saving both their worlds.
One possible plot could be that fem Loki is sent to the Harry Potter universe as a punishment or on a mission. She then has to navigate the wizarding world while trying to keep her true identity a secret. Another plot could be that she is drawn to the power of the Philosopher's Stone and wants to steal it for her own gain.
One possible plot could be that the portraits of James and Lily are somehow damaged or fading, and Harry has to find a way to restore them. He goes on a quest to find ancient spells or magical artifacts that can help.
Well, one possible plot could be a wizard who has picked up the Muggle habit of smoking cigarettes and how it affects his magic. Maybe his spells start to go awry because the smoke interferes with the magical energy. Another could be a group of Hogwarts students who discover cigarettes in the Forbidden Forest and have to deal with the consequences of this Muggle item in a magical place. But these are just very speculative ideas as it's not a common type of fanfiction.
Perhaps there's a fanfiction where Ron is forced to work at a dentist's office as a punishment. He has to deal with all kinds of strange patients, from veelas with very sharp teeth to giants with massive molars. His misadventures in the dentist office, trying to use magic to get out of his work or accidentally making things worse, could make for a really funny and engaging plot.
Another possibility is that Bellatrix is being controlled by an even more powerful and mysterious force. This force wants Harry Potter to be saved for its own purposes. Bellatrix is just a tool in this situation. The fanfiction could explore how she struggles against this control while still fulfilling the task of saving Harry.
In some fanfics, the dwarves could be part of a prophecy. The prophecy states that only the dwarves, with their unique skills and stout hearts, can save the 'Chosen One' - Harry Potter. They might have special abilities that are effective against the dark magic in the Harry Potter universe. For example, they could be immune to certain spells or have the power to break dark magic curses. So they embark on a quest to find Harry, who is lost or captured, and use their powers to free him and defeat the villains.
One possible plot could be that Hermione does something that Harry perceives as a great betrayal, like perhaps siding with the Ministry when Harry believes they are corrupt. This could lead to a deep - seated hatred from Harry.
Perhaps the fanfic could revolve around Harry Styles using 'camouflage' in a more metaphorical sense. For example, he could be trying to hide his insecurities or past traumas from the public eye. And as the story progresses, someone special might come into his life and gradually help him shed that 'camouflage' and face his real self.