A really interesting fanfiction could be about the phoenixes in the post - war world. How they help in the rebuilding process, like using their tears to heal the wounded, both physically and emotionally. And perhaps they play a role in bringing hope back to the wizarding community which has been through so much turmoil during the war.
There could be a fanfiction where the house - elves, having been inspired by Hermione's efforts before the war, start to demand more rights in the post - war era. They might form a sort of union and negotiate with the Ministry of Magic. Also, a story about the grindylows in the Black Lake and how they interact with Hogwarts students now that the war has changed the power dynamics and security measures around the school.
One great fanfiction could be about how thestrals are now more integrated into the wizarding world post - war. They might be used more openly in transportation or even in some sort of therapy for those who have lost loved ones. Another could focus on the centaurs and their new relations with wizards after the upheaval of the war. Maybe they start to teach astronomy in Hogwarts in a more official capacity.
Well, there's a fanfiction I read once called 'The Animagus Encounter with Magical Creatures'. In this story, the main character, an animagus, stumbles upon a group of magical creatures that are in danger. As an animagus, they are able to communicate and help the creatures in ways normal wizards can't. It was really exciting to see how the animagus form interacted with the different magical creatures. There are also fanfictions where the animagus form is that of a very powerful and ancient magical creature, like a phoenix, and they use their abilities to protect the wizarding world from dark forces.
There could be a fanfiction where Voldemort has a secret lair in Switzerland. The trio - Harry, Ron, and Hermione - have to journey to Switzerland to find a powerful magical artifact that can defeat him. They face challenges like the harsh Swiss winters and dangerous magical creatures native to the area. It would be a thrilling adventure as they try to outwit Voldemort's minions in this foreign magical setting.
I really like 'Eclipse'. It focuses on the rebuilding of Hogwarts and how the students and teachers are trying to move forward. It has some really interesting new relationships and character developments that are quite in line with the original Potterverse feel.
One interesting fanfiction could be about the adventures of Harry's children as they discover secrets from their parents' past that were never fully revealed. It might involve them exploring hidden chambers in Hogwarts that were forgotten over the 19 years.
One great 'creature James Potter fanfiction' could be those that involve werewolves. For example, a story where James Potter has to deal with a werewolf problem in Hogwarts. It might include his adventures in trying to keep the students safe while also understanding the werewolf's perspective. Another could be about magical creatures like hippogriffs, where James Potter forms a special bond with one and uses it to his advantage during some sort of magical quest or battle.
One of the great ones could be those that focus on thestrals. They are such mysterious and often overlooked creatures in the original series. Fanfictions about them can explore their nature, how they interact with wizards, and their connection to death in really interesting ways.
Some fanfictions center around the idea of a phoenix and a dragon. A phoenix's ability to be reborn and a dragon's power can be combined in a story. It could be about a battle where they fight side by side against dark wizards who are trying to steal their magical essence.
There could be a fanfiction where Harry and his friends discover an ancient water sport in the Forbidden Forest that has been long forgotten. They then try to revive it with the help of their magical skills and knowledge. This could involve exploring the magical properties of the water in the forest and how it affects the sport.
Well, there could be a fanfiction where the Forbidden Forest is filled with enchanted flowers that can talk. These flowers might give clues to Harry and his friends about hidden secrets in the forest or about Voldemort's next move. Or perhaps a story where a student creates a new breed of flower using magic, and this flower becomes a symbol of hope during the dark times at Hogwarts.
One interesting autism - related Harry Potter fanfiction could be about an autistic character attending Hogwarts and how they navigate the magical world with their unique perspective. For example, they might have special ways of interacting with magic that others don't understand at first.