A cursed challenge could be that the characters have to navigate through a magically - shifting maze that changes its layout based on their deepest fears. This would be really interesting as it combines elements of mystery, character exploration, and magical adventure, all of which are beloved in Harry Potter fanfics.
One 'cursed challenge' could be a spell - casting competition where the spells have unforeseen and comical side - effects. For example, a simple levitation spell makes the caster float instead. This would add humor and unpredictability, which might make readers adore the fanfic.
Perhaps a cursed challenge where the characters are given tasks by a mischievous magical creature. Each task is designed to test their wits and magical abilities in unexpected ways. Like they have to make a potion without using any traditional ingredients but only items found in a Muggle supermarket. It would be a fun and unique concept that could attract readers.
A cursed challenge can immediately raise the stakes in the plot. For instance, if the challenge is to break a powerful curse on Hogwarts within a certain time limit, it creates a sense of urgency. This makes the readers more engaged as they wonder if the characters will succeed.
One idea could be to have characters from Fma use their alchemy skills in the wizarding world of Harry Potter. For example, Edward could try to analyze the magical properties of potions using his knowledge of equivalent exchange. Another idea is a crossover of the villains. Maybe Father from Fma teams up with Voldemort, creating a more complex and dangerous threat for the heroes of both worlds to face. It could also be interesting to see how the Philosopher's Stone and the power of alchemy interact, like if the stone could be used to enhance alchemical processes or vice versa.
One idea could be to create a story where a new student arrives at Hogwarts with a unique and powerful form of magic that no one has seen before. This could lead to all sorts of adventures and challenges as they try to fit in while also dealing with those who might be jealous or afraid of their power.
Perhaps a challenge where the characters have to teach a class at Hogwarts for a day. Harry could teach Defense Against the Dark Arts, Hermione could take over Potions, and Ron could try his hand at Care of Magical Creatures. But there's a catch: they have to use a completely different teaching style than the regular professors. This would lead to some really interesting and humorous situations.
One factor could be extremely OOC (out of character) behavior of the main characters. For example, if Harry was suddenly portrayed as an evil, power - hungry wizard. Another could be really dark and disturbing themes that don't fit the generally family - friendly tone of the original series, like excessive gore or inappropriate relationships. Also, if the fanfiction completely butchers the established magic system or lore of the Harry Potter world, it might be considered 'cursed'.
One idea could be that characters from Fma use their alchemical skills in the wizarding world of Harry Potter. For example, Edward could try to transmute a magical object using his knowledge of equivalent exchange. Another plot idea might be that the Philosophers Stone from Harry Potter has some connection to the alchemy in Fma, and characters from both universes have to work together to protect it from dark forces. Also, perhaps a character from Fma gets sorted into one of the Hogwarts houses and has to adapt to the magical school life while still having their own alchemical powers.
Some fanfictions might focus on the relationship between Albus and Scorpius in more depth. Maybe they discover a hidden magical bond between them that gives them unique powers, and they have to keep it a secret from everyone else while trying to use it to solve a mystery in Hogwarts that the teachers can't seem to crack.
One idea could be exploring the alternate timelines more deeply. For example, what if Voldemort had actually won in one of those timelines? How would the wizarding world look like? Another could be delving into the relationship between Albus and Scorpius in a more complex way, like their adventures outside of Hogwarts that test their friendship.
Well, in this fanfic, perhaps Harry makes a wish for a world where magic and Muggle technology can co - exist peacefully. This would lead to some really cool crossovers, like wizards using smartphones to communicate. Or he could wish for a more inclusive Hogwarts, where all magical creatures are treated equally and can study there.
Maybe in the fanfic, Harry is forced to play the role of a doctor during a wizarding war. He has to quickly learn how to heal the wounded soldiers on the battlefield. This could involve him using his knowledge of magic in innovative ways and also facing moral dilemmas about who to save first. It would be a story full of action and tough decisions.