In the fanfiction, Auryn could hold a prophecy that relates to both universes. This would bring characters from Harry Potter and Naruto together to either prevent or fulfill the prophecy. The search for the meaning of the prophecy within Auryn could drive the plot, as characters have to cooperate and overcome challenges from both their worlds.
One interesting crossover could be Auryn being a magical artifact in the Harry Potter world that has some connection to the ancient magic of the Naruto universe. For example, it might hold the key to a powerful jutsu that could only be unlocked with the help of Hogwarts' magic. Another idea is that Auryn is a charm that a wizard in the Potter world uses to travel to the Naruto universe and gets involved in the shinobi battles.
The twin could change the plot by being more interested in academic magic than Harry. This might lead to him uncovering secrets in the library that Harry misses, which could be crucial in the fight against Voldemort.
Well, if Harry Potter had sans powers, he might be able to teleport around Hogwarts easily. This would make it much simpler for him to avoid danger or get to his classes on time. For example, when facing Voldemort, he could suddenly disappear and reappear behind him to gain an advantage in battle.
A swordsman could change the plot by adding a new element of combat. For instance, if there was a powerful swordsman on the side of the Order of the Phoenix, they could engage in more direct physical battles against Voldemort's forces. Instead of relying solely on magic, they could cut through enemy lines with a sword, which would be a different approach compared to the usual magical duels.
The story would change significantly. Harry's character development would take a different turn. He might become more confident in his physical abilities rather than just relying on magic. His view of the world could also expand as he learns about the Naruto universe's concepts. This could lead to new alliances and enemies. For example, he might attract the attention of some magical - ninja hybrid villains or make friends with characters from the Naruto world who cross over into the wizarding world.
You can start by looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own (AO3). These platforms have a vast collection of fanfictions from various fandoms, including Harry Potter. Just use the search bar and type in 'Auryn Harry Potter' and you should get a list of relevant fanfictions.
If Regulus Black survives in a fanfiction, it could change a lot. For example, he could have been a key informant against Voldemort much earlier. His knowledge of the Death Eaters and Voldemort's secrets could have helped the Order of the Phoenix more effectively. Maybe Sirius wouldn't have died as Regulus could have cleared his name sooner and they could have worked together against the Dark forces.
The plot would change a great deal. For one, Harry would be much more powerful physically. So when facing Voldemort, he could use Thor's strength in combat, not just rely on magic. He might be able to take on Death Eaters more easily.
An artificer can change the plot by creating a powerful magical object. For example, if they make a device that can nullify the Unforgivable Curses, it could change the power dynamics between the good and bad wizards. The Death Eaters would be desperate to get it to continue their evil deeds, while the Order of the Phoenix would fight to keep it safe.
An aloof Harry Potter can completely shift the fanfiction plot. His aloof nature could mean he doesn't trust people easily. So, when it comes to things like the Triwizard Tournament, instead of relying on his friends, he might try to handle it all alone. This could lead to him making different choices during the tasks. He may also be more likely to explore the Forbidden Forest on his own, which could lead to him uncovering secrets earlier or getting into more dangerous situations. Since he's not as involved with the main group, the group dynamics change, and so do the overall storylines.