You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions across various fandoms, including Harry Potter. Just search for 'Arthur Read' within the Harry Potter section on AO3.
They might be quite intrigued. Merlin, with his knowledge of magic, would likely compare the magic in the fanfiction to his own experiences. Arthur, on the other hand, might be a bit more confused at first but would gradually get into the story, especially if there were elements of heroism and adventure similar to his own quests.
Yes, in some fanfictions, Harry Potter is made out to be a descendant of King Arthur. Writers often create this connection to bring in elements of Arthurian legend into the Harry Potter universe, like the idea of a special destiny or the inheritance of certain magical powers or items related to Arthur.
Yes, there are quite a few. You can start by looking on fanfiction websites like Archive of Our Own. Some might focus on how the character inherits Arthurian traits or artifacts in the Harry Potter universe.
Yes, in some fanfictions, Harry Potter is made the heir of King Arthur. Writers often create this connection for the sake of a unique and exciting plot. They might draw parallels between Harry's heroic nature and Arthur's leadership qualities, and use elements from Arthurian legend to enrich the Harry Potter universe in their own creative ways.
One way could be through a prophecy. Similar to how there are prophecies in the Harry Potter series, there could be an ancient prophecy that ties Harry Potter to King Arthur. It could be that Harry has a role to play in restoring some of the lost magic or values of King Arthur's time, like chivalry and honor within the wizarding world.
It would probably explore family ties. For example, how the Weasley family would react to the discovery. There might be a whole new level of acceptance and closeness. Also, it could explore the idea of hidden family magic that only comes to light because of Harry's new connection.
Good fanfiction in this regard often has a deep understanding of Arthur's character. It should capture his love for all things Muggle and his inquisitive nature. For example, a story might show him introducing Harry to some unique Muggle artifacts he's collected over the years.
Family is a very common theme. Since Arthur is a family man, many fanfictions explore his relationship with his wife Molly and their children. They might show how he deals with family problems or how he supports his family during difficult times.
One that I've heard of is 'Arthur Read in the Wizarding World'. It's a really interesting take on how a character like Arthur Read from a different fictional universe would interact with the Harry Potter world. It has some really creative scenarios and character interactions.