A plot might involve Merlin leaving Camelot to seek greater magic knowledge. He has learned a lot in Camelot, but there are still secrets about his powers and the old magic that he can't uncover there. So, he sets off into the unknown, leaving behind his friends and the life he has known. This could lead to him encountering new magical creatures and learning ancient spells that he can later use to help Camelot in a time of great need.
Perhaps Merlin leaves Camelot because of a prophecy. The prophecy foretells that his presence in Camelot will bring great danger in the future, not to him but to those he loves. To protect Arthur, Gwen, and the others, he makes the difficult decision to leave. He then has to struggle with loneliness and the constant worry about Camelot while trying to find a way to change the prophecy's outcome.
Perhaps she has a new mission or calling that takes her away from Camelot. It could be something related to the greater magical world. For example, there could be an ancient magic that is in danger of being lost or misused, and she is the only one who can save it. Since Camelot has been rather unkind to magic in general, she might feel that she has to leave to fulfill this important task.
One idea could be Merlin having to face a powerful dark magic that not only threatens Camelot but also his own identity as a sorcerer. Another could be a story where Merlin discovers a long - lost relative who has a connection to an ancient magic that could either save or destroy Camelot. Or perhaps a plot where Merlin is transported to a parallel Camelot and has to find his way back while dealing with differences in that world.
Gwen could also be a very sympathetic character. If Merlin leaves, she would be one of the few who truly understand how much he has done for Camelot. She has seen his selfless acts and his loyalty. She might be heartbroken that he has to leave and feel powerless to stop it. Also, she has to deal with the potential loss of a great ally in the court and a good friend. She might struggle with trying to convince Arthur to let Merlin stay or find a way to bring him back.
Long - term, Arthur may start to question his own beliefs. Merlin leaving could make him re - evaluate his stance on magic. If he realizes how much he has lost without Merlin, he might start to think that perhaps the way magic has been treated in Camelot is wrong. This could lead to a change in Camelot's laws regarding magic in the future, but it would be a slow and difficult process as he has to overcome his own prejudices and the long - held views of the court.
Many fanfictions show Merlin's magic as a hidden force. For example, some stories depict him using magic subtly to influence events or protect Arthur without being detected. His magic is often portrayed as a double - edged sword. It can save Camelot but also put him at risk if discovered.
One interesting plot could be Saber Lily and Shirou teaming up in the Camelot era to face a powerful, previously unknown threat. Maybe a dark sorcerer who is trying to corrupt the very essence of Camelot. They would have to rely on each other's strengths, with Shirou's determination and Saber Lily's combat skills.
One common theme is the friendship between Arthur and Merlin. It's often explored more deeply, like how they support each other through tough times. Another theme is Merlin's struggle with his magic, whether it's hiding it or using it for the good of Camelot. And of course, the theme of loyalty to Camelot and its ideals is also prevalent.
One great Camelot Merlin Igraine fanfiction is 'The Legacy of Igraine'. It beautifully weaves the relationship between Merlin and the memories of Igraine. It shows how Merlin discovers more about Camelot's past through Igraine's story and how it impacts his present role in Camelot. The story has vivid descriptions and really makes you feel like you're in that magical world.
They could have an adventure where they help Camelot defend against a dark sorcerer. Harry's combat magic from Hogwarts would be useful, and Merlin's knowledge of Camelot's magic and its secrets would be crucial. Another adventure might be to find a lost magical artifact that is important for both Camelot and the wizarding world. Along the way, they might encounter magical creatures unique to Camelot that Harry has never seen before, like the Questing Beast.
One great story is 'The Once and Future King's Advisor'. It delves deep into Merlin's role in Camelot and his relationship with Arthur. Another is 'Magic in the Shadows of Camelot' which shows how Merlin uses his magic secretly to protect the kingdom. And 'Merlin's Unseen Sacrifices' is also a good one as it focuses on the personal sacrifices Merlin makes for Camelot.