It would change the magic system a great deal. In the normal Harry Potter world, magic is somewhat European - centric. However, if Harry is the son of Set, the magic system might blend Egyptian mythology with the existing wizarding world magic. There could be new forms of divination based on Egyptian methods, like reading the movements of the Nile's waters or the behavior of sacred animals. Magic related to death and the afterlife could also be different, perhaps more in line with the Egyptian beliefs about the journey to the underworld.
Well, an apocalypse in Harry Potter fanfiction can change the magic system in multiple ways. Firstly, the availability of magical resources might change. For example, if there are no more potion ingredients growing in the wild, wizards have to find alternatives or create synthetic ones. Secondly, the way magic is taught and learned could be different. There might be a more urgent need for self - taught magic as Hogwarts could be in ruins. And finally, the very nature of some spells could be altered. Dark magic might become more prevalent and the boundaries between dark and light magic could become blurred as everyone is just trying to survive.
His relationships with the other characters are also altered. Dumbledore, for example, had a big role in Harry's life in the original story. But if Harry is Grindelwald's son, Dumbledore's attitude towards him might be more complex. Dumbledore had a history with Grindelwald, and this new connection could make Dumbledore both more protective and more wary of Harry. The same goes for other characters like Snape. Their interactions with Harry would be colored by this new family connection.
It completely alters the family background. In the original, Harry was an orphan from the Potter family, but in this fanfiction, he's part of the Malfoy family. This changes his upbringing, values, and social status in the wizarding world.
The story would also shift in terms of Harry's place at Hogwarts. His sorting into Gryffindor might be more complex. Since he's related to the Black family, which has a history of being in Slytherin, there could be an internal struggle within Harry about his house loyalty. And his friends, like Ron and Hermione, might react differently to this new revelation about his parentage as they've always known him as a Potter.
The magic system could be much more advanced. After 1000 years, Harry might have discovered new spells or ways to use magic that are far beyond what was known in the original story.
It changes it a great deal. Firstly, Harry's origin is completely different. Instead of being an orphan with a mysterious connection to Voldemort, he now has a connection to the Beyonder. This alters his self - discovery journey. He's no longer just finding out about his role in the wizarding world against Voldemort, but also about his otherworldly heritage.
Well, it changes it drastically. In the original, Harry is the hero against Voldemort. But in this fanfiction, the dynamic is completely different. Harry's abuse gives him a different background and the revelation of his relation to Voldemort makes him an outcast in a new way.
It changes the magic system. Instead of just relying on wands and spells, Harry can now access Pegasus - related magic. For instance, he might be able to heal faster like Pegasi are known for their resilience. It also changes his social status. He is no longer just a famous wizard, but also a mythical being's son, which makes him more of an enigma.
The whole dynamic of the fight against Voldemort would shift. If Harry were Snape's son, Snape's loyalty and actions throughout the series would be re - evaluated. Harry might have access to different knowledge and skills that Snape could pass on. His connection to the Dark Arts might be more nuanced. Also, the way the other Hogwarts professors treat Harry would be different. They might be more cautious or more expectant of him, given his new family connection.
Well, it changes the story in multiple ways. If Harry were the son of Dean Winchester, his early life would be filled with knowledge of the supernatural that isn't strictly magical. His father's hunting skills and knowledge of the non - magical but still otherworldly creatures would shape his view of the world. When he enters Hogwarts, he might be seen as an oddity. His way of thinking and reacting to situations would be different. For instance, he might be more skeptical of some of the Hogwarts traditions as he's been raised with a more 'practical' view of the supernatural. His interactions with teachers and classmates would be colored by his unique background, and he might even introduce some new ways of dealing with magical threats based on what he learned from Dean.