Power would be a major theme. Since Harry is the 'black king', it implies a great deal of power and perhaps a different kind of leadership. Another theme could be identity, as Harry has this new role that is quite different from his traditional one.
One of the main themes is likely to be transformation. Harry is changing from his known self to the 'black king', which would involve changes in his relationships, his goals, and his place in the wizarding world. Also, there could be a theme of secrecy. If he is the 'black king', he may need to keep this identity hidden for some reason, adding an element of mystery to the story. And of course, power dynamics, as he now holds a new and perhaps more controversial form of power.
In 'Harry Potter is the Witch King' fanfiction, a major theme would be the clash of different magical cultures. The 'Harry Potter' universe has its own set of magical rules and traditions, and the Witch King comes from a different lore. Fanfictions might explore how these two different magical worlds interact when Harry is at the center of it. There could also be themes of loyalty. Harry's friends in the 'Harry Potter' world might have mixed reactions to his new identity, and he has to deal with who he can trust and who might turn against him. Additionally, the theme of redemption could be explored. If the Witch King has a darker past, can Harry as the Witch King find a way to redeem that legacy?
In this fanfiction, the theme of transformation is prominent. Harry's life is transformed when he becomes the Black heir. He has to adapt to new expectations and a different social standing within the wizarding world. The theme of loyalty also comes into play. He has to decide which parts of the Black family he wants to align himself with and which values he will uphold. And finally, the theme of discovery is key. Harry is constantly uncovering new things about the Black family and his own place in it, which drives the story forward.
One main theme is family heritage. Since it involves the Black and Bones families, there's a lot of exploration of their lineages, their magical abilities passed down through generations, and the family secrets that come with that.
One main theme is power. The Black Fire is often depicted as a very powerful force, and the characters must grapple with how to control or use it. Another theme is family legacy. Since it's related to the Black family, it explores how the family's past actions and secrets are intertwined with the Black Fire. Also, there's the theme of good vs evil, as the Black Fire can be used for both noble and nefarious purposes.
One main theme is family loyalty and betrayal. In many Black family tree fanfictions, characters have to decide whether to stay true to their family's traditional values or break away for what they believe is right. For example, Sirius Black was a prime example of this in the original series, and fanfictions often expand on this idea within the context of the whole family tree.
Family is a major theme. The Black sisters come from a complex family background, and in these fanfictions, it's often explored how their family ties influence their actions. For example, Narcissa's loyalty to her family and how it might conflict with her feelings towards Harry.
One main theme is family. It shows a different family structure for Harry, with Sirius as his father. Another theme could be identity. Harry would have a different sense of self, being part of the Black family. And there's also the theme of loyalty, as Sirius would be even more fiercely loyal to his son in these stories.
Many black Harry Potter fanfictions explore the theme of heritage. If Harry is black, his connection to magic might be linked to different cultural heritages. It could be African - based magic or a blend of different magical cultures. This theme allows for a lot of creativity in exploring new types of magic and how they interact with the existing wizarding world.
One common theme is family heritage. Since the Blacks have such a complex and often dark family history in the Harry Potter universe, many fanfictions explore how that heritage affects the characters. For example, a character might struggle with the family's reputation for dark magic.
The themes could include respect, of course. Harry showing respect for the goblins might lead to a broader exploration of how different magical beings should respect each other's existence and rights. Also, there could be a theme of redemption, perhaps if the fanfiction involves Harry trying to make up for past wrongs that wizards have done to goblins. And cooperation might be another theme, as Harry could be working with the goblins towards a common goal.