Some fanfictions might explore how they got married secretly. It could involve Merlin creating an illusion to hide the ceremony from those who would object. And then they have to deal with the aftermath of keeping such a big secret, like how it affects their relationship with other characters like Guinevere or Lancelot.
There could be a plot where Arthur gets injured badly, and Merlin has to use his most powerful magic, which he has been hiding even from Arthur, to save him. This could be a turning point in their relationship, making them realize how much they mean to each other and strengthening their bond as husbands.
Well, one plot could be them facing challenges together as a couple in Camelot. Maybe there are court nobles who oppose their relationship, and they have to fight for their love while also maintaining the kingdom's stability. Another could be Merlin using his magic in new ways to protect Arthur, not just as his friend and advisor but as his husband.
Maybe a plot where Arthur and the knights get a glimpse into Merlin's past through some magical artifact. They see his early days of learning magic and the struggles he faced, which makes them understand his motives and loyalty better. This could lead to a stronger bond between them all.
One possible plot could be that Merlin has some hidden magical ability that makes him a valuable asset in a political marriage to Arthur. For example, his magic could be the key to uniting two kingdoms. Another plot might involve a magical curse that forces the marriage. A third idea could be that Merlin and Arthur are tricked into a marriage by an evil sorcerer who wants to disrupt Camelot from within.
One interesting Merlin and Arthur fanfiction could be where Merlin reveals his magic to Arthur in a very unexpected and comical way. For example, during a royal banquet, when a knight accidentally drops a sword that's about to impale Arthur, Merlin freezes time and casually walks over to pick up the sword, then unfreezes time and acts like nothing happened. Arthur is left completely bewildered until Merlin finally confesses his powers.
One interesting plot can be found in 'Courting the Warlock'. Here, Arthur starts courting Merlin after realizing that Merlin's magic can be a great asset to Camelot. But as he courts Merlin, he truly falls in love, not just for the magic. This creates a complex dynamic as Merlin is initially suspicious of Arthur's motives. Also, in 'The Royal Courtship', the plot involves Arthur trying to court Merlin while also having to deal with political unrest in Camelot. He has to balance his love for Merlin with his responsibilities as a king - to - be, which makes for a very engaging story.
It completely changes the dynamic. Instead of just a friendship, it adds a layer of romantic love. Their interactions now have a different undertone. For example, a simple glance between them in the original story might just be friendly, but in the fanfiction, it could be filled with passion and love.
One interesting plotline could be Merlin using his magic in modern times to secretly protect Arthur, who is a powerful businessman or politician. For example, he might use magic to prevent assassination attempts on Arthur.
One interesting 'arthur forgets merlin fanfiction' could be where Merlin has to use his magic in new and secretive ways to re - acquaint Arthur with their friendship. Maybe he creates small magical incidents that jog Arthur's memory in a subconscious way.
There might be a fanfiction where Arthur and Guinevere face a political crisis in Camelot. Merlin, with his unique insights, helps them navigate through it. He might use his magic subtly to influence the nobles in favor of the king and queen's decisions. For example, he could make a symbol appear during a council meeting that sways the nobles to support Arthur and Guinevere's new policy for trade with a neighboring kingdom.
There might be a fanfiction where Merlin uses his magic to create a special bond between Arthur and Gwen. This bond allows them to communicate telepathically, which helps them in battles and diplomatic situations. As they grow closer through this unique connection, they also face challenges from those who fear the unknown magic at work.
One interesting story could be where Merlin uses his magic in subtle ways to tease Arthur during their adventures. For example, he might make Arthur's sword just out of reach for a moment, only to have it magically appear in his hand seconds later, leaving Arthur both frustrated and amused at Merlin's antics.