It can be shown through a character suddenly discovering an unusual power they didn't know they had, like being able to levitate without a wand because it was an inherited ability.
Well, in some fanfics, the inheritance of rare abilities might involve things like the ability to see magical auras in a more detailed and profound way. This could be passed down from a seer in the family who had a different kind of sight. Also, there could be the inheritance of the ability to communicate with magical creatures on a deeper level, like understanding their languages without the use of spells. It could come from a family that has a long history of working closely with magical beasts.
In some Harry Potter fanfics, time - related rare abilities exist. A character might have the power to freeze time in a small area, allowing them to perform actions without being noticed. Or they could have the ability to see brief glimpses of the future related to magical events. This would be very useful in predicting the moves of dark wizards or finding hidden magical objects.
There's also 'Fem Potter and the Ancient Magic'. In this fanfic, the female Harry has an extremely rare ability related to ancient magic. This ability allows her to unlock secrets within Hogwarts that have been hidden for centuries. The story is really engaging as it weaves together the mystery of the ancient magic with the familiar world of Harry Potter. It's different from the original series in a refreshing way.
Sure. One example is the ability to teleport not just within Hogwarts but across different magical realms. This would be a huge advantage compared to normal apparition. Another could be the power to read the magical auras of objects and people to determine their true nature and any hidden secrets or curses.
These fanfics often explore character development in new ways. When Harry is female and has rare abilities, it can change her relationships. For instance, her friendship with Ron and Hermione might be different. Also, the rare abilities can lead to unique plotlines. She could use her ability to see the past to solve mysteries that were left unsolved in the original series. This gives fans a chance to see more of the magical world they love and discover new things about it.
In Harry Potter fanfiction, a rare ability could be the power of true prophecy. While there are seers in the original series, in fanfic, a character might have the ability to see not just vague glimpses of the future but detailed and accurate prophecies that can change the course of the wizarding world. Also, the ability to heal any wound or illness instantaneously could be considered rare. This would make the character a sort of super - healer, far more powerful than Madam Pomfrey. And some fanfictions might explore the ability of a wizard or witch to transform into any object or creature at will, not just those within the Animagus transformation limits.
One interesting plotline could be a character inheriting a magical ability related to a rare creature that allows them to communicate with it. For example, inheriting the power to speak Parseltongue from a Basilisk inheritance. This could lead to all sorts of adventures as they use this ability to uncover secrets in the wizarding world. Another could be inheriting a rare creature's protective instincts, like a Hippogriff's loyalty. They might then protect their friends and Hogwarts from dark forces in unexpected ways.
Harry Potter himself is often a central character in such fanfictions. Given his connection to various magical creatures throughout the original series, it's not a stretch to imagine him inheriting something related to a rare creature. Hermione could also be a common character. Her thirst for knowledge might lead her to discover or be involved in a rare creature inheritance. Ron, with his Gryffindor bravery, might also be in the mix, perhaps inheriting a trait from a more combat - related rare creature.
Rare abilities often act as a catalyst in the plot of Harry Potter fanfiction. Let's say a character has the ability to travel through time freely. This ability can disrupt the normal flow of events. They might accidentally change something in the past that has a huge impact on the present and future. It could lead to a situation where the main characters have to find a way to fix the timeline. Or if a character has the rare ability to control the minds of all magical creatures, they could use this power to either start a revolution among the creatures or to create an army, which would completely change the political and social structure of the wizarding world and thus drive the plot forward.