In a fanfiction, the black cat familiar could have a connection to the other side. It could see the ghosts and spirits in Hogwarts more clearly than Harry and help him understand their messages. This could be very useful when trying to solve mysteries related to the school's past or the Dark Arts.
Perhaps the black cat is a cursed familiar. It was once a normal cat but was cursed by a dark wizard. Harry has to find a way to break the curse while also dealing with the cat's unpredictable behavior. This would add an interesting layer of drama and mystery to the story.
One popular fanfiction concept could be that the black cat familiar helps Harry in his sneaky missions around Hogwarts. It could use its stealth to spy on Snape or Malfoy, for example. The cat might also have special magical abilities, like being able to sense dark magic from a distance.
In some fanfiction, a familiar might get lost in a different dimension. So, the main character has to go on a journey to find it. Along the way, they meet strange new creatures and learn new spells, which is really exciting. It also shows a different side of the bond between a wizard and their familiar.
One interesting scenario could be shopping for magical pets in Diagon Alley. In some fanfictions, characters might discover rare and unique creatures that are not typically found in the original books. For example, a magical hybrid of a phoenix and a cat that can both fly and purr.
Well, there are dueling scenarios where characters from different generations meet in a magical duel. For example, a character from Harry's time might accidentally travel back and duel with a student from the Marauders' era. This can lead to some really creative uses of magic as they try to outwit each other with different spells and strategies they've learned in their respective times.
One interesting scenario could be an OC who is a muggle - born wizard but has unique magical abilities not seen in regular wizards. For example, they might be able to communicate with magical creatures in a way that no one else can.
A common boggart scenario in fanfiction is related to the characters' insecurities. For Harry, it could be that the boggart shows him as the cause of all his friends' misfortunes, emphasizing his fear of being a burden or a danger to those he loves. This can add more depth to his character and explore his self - doubts further.
One interesting scenario could be when the characters are in detention and they discover a hidden magical object. For example, in some fanfictions, Harry and his friends might find an old, enchanted diary during detention in the castle. This diary could hold secrets or be a portal to another time or place.
One interesting 'last will' scenario could be a character leaving behind a powerful magical artifact in their will. For example, a wizard might leave a wand with special properties to Harry Potter, which could be a key to defeating a new dark force. This would add an extra layer of mystery and power to the story.
In some Harry Potter hospital fanfictions, there could be a scenario where a student gets injured during a Quidditch match and is rushed to the hospital wing. There, Madam Pomfrey uses her magic to heal the student in a very unique way, like using special potions that are not mentioned in the original books.
One interesting concept could be the unique bond between the wizard and the demon familiar. It might be different from the normal familiar relationships in the original Harry Potter series. For example, the demon familiar could have special powers that are both a help and a hindrance to the wizard. It could also bring in new elements of danger and mystery, like being hunted by other dark forces because of its demonic nature.