In fanfiction, the revelation of Merlin's magic can be much more elaborate. In the show, it was a slow build - up, but in fanfictions, it can happen all at once or in a very different order. For example, he might reveal his magic to Morgana first instead of Arthur. Also, the extent of his magic can be different. Fanfictions might give him abilities like teleportation or mind - reading which were not shown in the show. Another difference is the reaction of the characters. In the show, Arthur had a certain way of reacting, but in fanfictions, characters can have a wide range of reactions from immediate acceptance to total rejection and trying to kill Merlin.
The author can describe his physical appearance. For example, mention his pale face, dark circles under his eyes, and a slump in his posture. These details can quickly convey to the readers that he is exhausted.
One way Harry could be as strong as Merlin is in the area of divination and prophecy. He could have an enhanced ability to understand and even manipulate prophecies. This would mean he could foresee events accurately and take actions to either prevent or encourage certain outcomes, much like Merlin was often involved in the fates of kingdoms through his knowledge of future events.
One great female Merlin fanfic could be one where she uses her magic in unique ways to save Camelot. For example, in a story she might use her powers to heal the knights secretly when they are injured in battle. This would add an interesting twist as she has to hide her actions from Uther.
If Merlin died in the fanfiction, it could trigger a series of tragic events. The balance of power could tip, and the villains might seize the opportunity to attack. It could also bring out hidden strengths in the remaining characters as they try to cope with the loss.
In a more humorous take on the 'Merlin tied to a bed' fanfiction, it could be that Merlin has fallen ill and the overly - protective Gaius has tied him to the bed to make sure he rests. Merlin, being the active person he is, complains constantly. Arthur comes to visit and teases Merlin about finally being still for once. Meanwhile, Merlin tries to convince Arthur to let him loose, promising that he'll be fine. Eventually, Gaius relents and unties Merlin, who then immediately starts bustling around the room.
One possible reason could be a magical curse. In many Merlin fanfictions, magic is often used as a plot device. A dark sorcerer might cast a spell on Merlin to make him forget certain things, perhaps to prevent him from using his powerful magic to oppose them. Another reason could be a self - imposed forgetting due to trauma. Merlin has witnessed and endured a great deal of pain and suffering. To protect his own mental state, his mind might subconsciously block out certain memories.