Perhaps a story where a new knight arrives at Camelot. This knight has a mysterious past and strange powers. Merlin suspects there's more to him than meets the eye, and together with the other knights, they try to figure out if this new knight is a friend or a foe. It could create a lot of tension and intrigue in the fanfiction.
A plot could involve Merlin getting cursed and the knights having to find a way to break it without Merlin's magic to guide them. They might have to rely on old legends and their own wits to save him. This could lead to some great character development for the knights as they face challenges they usually rely on Merlin to solve.
One idea could be exploring the backstories of the Tenkai Knights more in - depth. For example, how they got their powers and what their lives were like before becoming knights. Another could be a crossover with another similar - themed anime, like creating a scenario where the Tenkai Knights have to team up with characters from another mecha - based show to fight a common enemy. And a third idea is to focus on the relationships between the knights and how they grow and develop over time.
One plot idea could be Merlin and Nimue teaming up to save a magical forest that is being threatened by dark forces. They could use their combined magic to fend off the evil entities. Another idea is a time - travel plot where they are sent to the future and have to adapt to the new world while also finding a way back. And perhaps a plot where they are wrongly accused of a crime in Camelot and have to prove their innocence together.
One plot idea could be Merlin, as a borrower, is discovered by Arthur. At first, Arthur is shocked but then becomes intrigued. He decides to protect Merlin from the other humans in the castle. Another idea is that Merlin, in his tiny form, uses his magic in new and creative ways to help the borrowers' community. For example, he could create miniature tools or defenses against predators. A third idea might be that Merlin has to go on a quest to find a magical item that can restore his normal size, all while facing the challenges of being so small in a big world.
One idea could be that Merlin, as a wizard, is hunted by vampires because his magic is seen as a threat to their existence. But then he discovers that some vampires are not as evil as he thought and they form an uneasy alliance to fight a common enemy, like a dark sorcerer.
One idea could be Merlin having to deal with the political intrigue of being a king. He might face challenges from nobles who don't trust his magic. Another could be Merlin using his magic in unique ways to improve the kingdom, like creating new irrigation systems for farmers. Or perhaps he has to form alliances with other kingdoms while hiding his true identity as a powerful sorcerer.
One idea could be exploring a different magical realm within the 'the merlin conspiracy' universe. Maybe there's a hidden land where the magic is more primal and ancient. Another could be a story about a young wizard who discovers they have a unique connection to Merlin himself and must use that to stop a new dark threat.
Perhaps Merlin has to save the knights from a curse. He could go on a long journey to find the ingredients for an antidote while facing many obstacles along the way. He might have to outwit evil spirits or solve difficult riddles to get what he needs to break the curse on the knights.
One idea could be that Peter Pan and Merlin meet in a magical realm between Neverland and Camelot. They team up to fight a common enemy, like an ancient evil sorcerer who is trying to steal the magic from both their worlds. Peter's ability to fly and his eternal youth could be combined with Merlin's powerful magic skills to create a really cool adventure.
One idea could be exploring a scenario where Merlin has to use his magic secretly to protect the relationship between Lancelot and Guinevere from the prying eyes of those who oppose it. Maybe he creates illusions to give them private moments.
Perhaps a dark wizard in the Fantastic Beasts world tries to use Merlin's power for evil. Merlin has to team up with Newt and Tina to stop this wizard. Along the way, Merlin discovers new magical abilities within himself as he faces the different magical challenges presented by the Fantastic Beasts world.