If Merlin is reborn, it would likely shift the power balance significantly. His knowledge of ancient magic is vast. He could potentially teach new spells and techniques to the younger wizards, giving them an edge over the dark forces. For example, he might introduce powerful defensive spells that could protect Hogwarts better than the existing ones.
On the other hand, the dark wizards might see Merlin as a huge threat. They could try to either recruit him or eliminate him. But if Merlin teams up with the good side, the combined power of his magic and the existing magical forces at Hogwarts would make it much harder for the dark side to gain ground. His rebirth could be the turning point in the fight against evil in the wizarding world.
Merlin might become more confident as Harry Potter. In his past life, he was often hiding his magic, but as Harry, he can be more open in the wizarding world. So he could be more assertive in dealing with challenges.
Merlin might start by teaching Harry the basics of magic from a different perspective. Maybe he would show Harry how to draw magic from the very essence of nature. For example, instead of using a wand in the traditional way, he could teach Harry to use his hands and the energy around him.
Another possible candidate in fanfictions could be Neville Longbottom. He has a deep connection to the magical world and shows great courage and growth throughout the series. His latent magical abilities, which are finally fully realized, could be interpreted as him being an heir of Merlin in a way. He has the potential to be a great wizard, just like Merlin was.
If Harry Potter found the Necronomicon in fanfiction, it could have a huge impact on the wizarding world. It might open up new areas of magic study that were previously unthinkable. But it also poses a great threat. Dark wizards could be attracted to the power it represents and start causing trouble. The Ministry of Magic would likely get involved, either to protect Harry or to confiscate the book.
They may gain a deeper understanding of how the outside world perceives their world. Fanfiction often reflects the hopes, dreams, and fears that fans have about the wizarding world. So, by reading it, the Potter family can get a sense of what others find interesting or concerning about their world. For instance, if a lot of fanfiction focuses on the social inequalities in the wizarding world, it might make them more aware of these issues and perhaps even inspire them to do something about it.
Yes, there are likely some fanfictions out there with this concept. The idea of Merlin reincarnating as Harry Potter combines two very popular magical universes. It allows for a lot of interesting plot twists and character development. Writers might explore how Merlin's ancient magic and knowledge would manifest in the modern world of Harry Potter, and how it could change the course of the story we know.
Merlin's magic is very old and powerful. It could make Harry more attuned to the natural elements of magic. For example, he might be able to control the weather more easily during battles. His spell - casting could also become more instinctive and less reliant on wands as Merlin's magic was less wand - centric.
It could bring a new sense of harmony. Aphrodite's influence of love might seep into the wizarding world. There could be less conflict between different houses in Hogwarts as students start to understand the power of love and unity. Wizards and witches might become more open - minded towards other magical creatures too, as Aphrodite's concept of love could expand their view of the world around them.
The combination might introduce new types of magic that could change how magic is taught in Hogwarts. Teachers would have to study and understand this new magic. It could also lead to new careers in the wizarding world related to researching and controlling this combined wand magic.
On the other hand, there might be some initial resistance. There could be those in the wizarding world who are traditional and think that Harry should have married within a certain group. But in the long run, their relationship could force the wizarding world to re - evaluate some of its old - fashioned ideas about relationships and family, leading to a more inclusive and progressive society.