A possible plot could be that Voldemort somehow gets his hands on the knowledge of Phoenix Slayer magic. He then tries to corrupt it for his own evil purposes. The protagonists must then figure out how to counter this new threat. They might seek help from ancient magical texts or even from phoenixes themselves to find a way to stop Voldemort's misuse of this powerful magic.
Another plot idea might involve a young wizard or witch who discovers they have an innate ability for Phoenix Slayer magic. They then struggle to keep it a secret while also trying to use it to help their friends in Hogwarts. This could lead to a series of adventures as they explore the limits of this new magic, all while dealing with the regular Hogwarts drama like exams and rivalries.
One interesting plot idea could be a crossover where the Phoenix Slayer magic is introduced into the Harry Potter world and a character has to learn this new form of magic to defeat a dark wizard. Maybe the Phoenix Slayer magic can control the power of phoenixes in a different way than what is known in the original Potterverse.
In a fanfiction, the Phoenix and the Basilisk could be two parts of an ancient prophecy. Harry Potter is the one foretold to either unite them or destroy one to save the other. Along the way, he has to learn about the true nature of both creatures. He might find that the Basilisk isn't as purely evil as it seems and the Phoenix has a more complex role than just being a symbol of good. This could lead to a very engaging story full of moral dilemmas and exciting magical encounters.
A plot could be where the Phoenix wand is stolen and Harry has to go on a quest to get it back. He might have to face dark wizards who want to use the power of the phoenix feather for evil. Along the way, he discovers more about the true nature of his wand and the connection it has to the wizarding world as a whole.
One idea could be a wizard using card magic to solve a mystery at Hogwarts. Maybe the cards hold clues that only the protagonist can decipher through their knowledge of card magic.
One idea could be a story where a young witch or wizard discovers a hidden, powerful spell within the Ministry's archives that was long forgotten. This spell could have the potential to either save or destroy the wizarding world, and they must decide what to do with it.
Another plot could focus on how the family magic affects relationships. Maybe Harry uses family magic to strengthen his bond with his children in a way that normal magic can't. He could teach them unique family spells that help them understand their heritage better.
Well, in some fanfictions within 'harry potter and the foreign magic fanfiction', there might be a plot where a foreign wizard or witch comes to Hogwarts and brings their unique form of magic. This could lead to new friendships and rivalries. They might introduce a different way of brewing potions or casting charms that challenges the existing knowledge of the Hogwarts students. It could also be about a foreign magical artifact that holds great power and the characters have to figure out how to use it or keep it safe from the wrong hands.
Another plot idea could be that Harry, as a master of magic, has to go back in time to correct some mistakes in the past that are now causing problems in the present. This would involve him facing his younger self and trying to guide his actions without disrupting the timeline too much. He would need to use his advanced magical skills to avoid detection and make the necessary changes.
One idea could be a story where a new character discovers a hidden water magic spell in the Forbidden Forest. This spell has the power to create sentient water creatures that can help protect Hogwarts. Another could be about a group of students using water magic to uncover a long - lost underwater chamber in the Black Lake filled with ancient magical artifacts.
Another plot could involve Harry being reincarnated as a different character in the wizarding world. This would give a whole new perspective on the relationships and power dynamics. He could be a Squib who suddenly discovers latent magic within himself in a very different way than before.
One idea could be a story where a new student arrives at Hogwarts with a unique ability to control wind magic in ways not seen before. This student could use their wind magic to help the Gryffindor Quidditch team gain an edge in a crucial match, for example, by creating strong gusts to disrupt the opposing team's players or guiding the Golden Snitch in a particular direction.