A really engaging plotline could be Dobby forming an alliance with other magical creatures in the wizarding world to protect Harry. This alliance could include centaurs, goblins, and other house - elves. They all come together with their unique skills and knowledge to keep Harry safe from the dark forces. It would be a story of unity among the different magical beings in the face of great danger.
One interesting plotline could be Dobby using his unique magic abilities to help Harry in a new and unexpected way, like finding a hidden magical artifact that could turn the tide in the fight against Voldemort. Another could be Dobby getting into trouble while trying to protect Harry at Hogwarts, causing a series of comical and heart - warming events.
Dobby's character could be developed further by showing his growth in confidence. After being freed, he could become more assertive in his actions and decisions, not just relying on his loyalty to Harry but also on his own sense of right and wrong.
One interesting plotline could be how Dobby's unique house -elf magic and knowledge influence Harry's upbringing. For example, Dobby might teach Harry some secret elf - made spells. Another could be how Harry's relationship with the wizarding world changes since he is being raised outside of the traditional Hogwarts -centric environment. He might have a different perspective on things like pure - blood supremacy.
In some fanfictions, an elf inheritance could involve a change in the social hierarchy. If an elf inherits a great deal of magical knowledge or power, they might start to demand more rights and equality among the wizards. This could create a lot of tension and conflict as wizards are forced to re - evaluate their views on elves.
Well, perhaps the house - elf is constantly tidying up in really cool ways. It could be folding clothes by magic so that they are always perfectly creased, or it might arrange the books in Harry's library in a way that makes it easier for him to find the exact spell book he needs at any given time. And it could also have a special connection with the other magical creatures around the house, like communicating with the garden gnomes and getting them to stay in line without causing trouble.
One interesting plot could be Harry Potter discovers he has a special connection with the house elves. Maybe he can understand their language without using a spell. So he teams up with a group of house elves to uncover a secret that's been hidden in Hogwarts for centuries, like a hidden chamber that holds the key to a powerful magic that can save the wizarding world from a new dark threat.
One interesting fanfiction could be about a house - elf who gains magical powers beyond what is normal for his kind. This could lead to all sorts of adventures where he has to use these powers to protect Hogwarts from a new, unknown threat.
A plot might involve Harry Potter as a house - elf being magically bound to serve Draco Malfoy. This would create a really tense situation as Harry has to resist Draco's cruel orders while still trying to figure out how to break the spell. He could also discover that there are secrets in Malfoy Manor that are related to the Dark Arts and the rise of Voldemort. As he tries to expose these secrets, he uses his wits and the skills he has as Harry Potter, even in his house - elf form, to outsmart the Death Eaters and the Malfoys.
In some fanfictions, the high elf inheritance might involve a power struggle. For example, there could be dark wizards who want to use the power of the high elf inheritance for evil purposes. The protagonist, who has this inheritance, has to fight against them to protect the wizarding world. This often involves a series of exciting battles and strategic planning.
One interesting plotline could be a story where the House of Lords in the wizarding world has to deal with a new dark magic threat. Maybe they work with Hogwarts students, including Harry Potter, to find a solution. Another could be a political intrigue within the House of Lords, like a power struggle between different wizarding families.
A third plotline could be centered around a young Black heir or heiress who is trying to break free from the traditional and often dark ways of the family. They might befriend characters from other houses or even Muggle - borns, causing a stir within the family and the wizarding community at large.