One interesting plotline could be the potions professor secretly mentoring Harry in advanced potions outside of class, leading to Harry's rapid improvement and discovery of new potions with unique magical properties.
In some fanfictions, the potions professor might have a hidden past related to a powerful dark magic potion. Harry stumbles upon this secret and has to decide whether to trust the professor or expose him. This creates a lot of tension and moral dilemmas throughout the story.
Hermione is often a common character. She might be helping Harry with research related to the potions professor's strange behavior or new potions they are working on. For example, she could be scouring the library for information about a rare ingredient the professor has introduced.
One possible plotline could be Harry finding some ancient potions book in the library that has unique brewing methods. He then secretly practices them in an abandoned classroom.
One interesting plotline could be Harry discovers a hidden potion recipe that gives him the ability to communicate with magical creatures. Another might be Harry has to make a potion to save a sick friend under very difficult circumstances, like with limited ingredients.
Well, perhaps there's a story where Professor Vector and the characters in the 'Harry Potter' world find themselves in an alternate dimension due to one of Vector's experiments gone wrong. And they have to rely on Harry Potter's unique skills and Vector's knowledge to get back. There could also be a plotline about a time - traveling adventure involving them, where they go back in time to change an important event in the wizarding world's history.
One interesting plotline could be Neville, who is already good at Herbology, discovers a new way to use plants in potions with Harry's help. This changes the way potions are made at Hogwarts.
Well, a popular plotline is the redemption of Snape through his relationship with Harry. In these fanfictions, Harry gradually discovers the sacrifices Snape has made for him and the wizarding world. This leads to a new - found understanding and even a form of friendship between them. There are also fanfictions that explore what would happen if Snape adopted Harry, which is a very different take on their relationship.
One interesting pet potion in Harry Potter fanfiction could be a growth potion for magical pets. It might make a small owl grow into a large and majestic one overnight. Another could be a potion that gives pets the ability to speak human languages for a short time, leading to some really funny and heart - warming interactions with their owners.
One interesting Harry Potter potions fanfiction could be one where Hermione discovers a new potion that can temporarily give the drinker the ability to speak Parseltongue. It adds a new layer of mystery and adventure to the story. Another could be a story where Snape's old potions notes are found by a new student, and they start to recreate his unique and often dangerous concoctions.
One idea could be a fanfiction where a character discovers an ancient potion recipe that has been lost for centuries. They then embark on a journey to gather all the rare ingredients and brew it, not knowing what the potion's true effects are.
One interesting scenario could be a new student who has an unexpected natural talent for potions, much to Snape's surprise. This student might be able to create complex potions with ease, while others struggle.