In some fanfictions, Merlin might use his magic to change the past. For example, he could go back in time to prevent a certain event from happening that had a negative impact on Camelot. Maybe he'd stop an assassination attempt on Arthur or change the way a law was made that was unjust.
Well, it could be that Merlin changes the past by influencing people's memories. He has powerful magic, and perhaps he can tweak how people recall events. So, if there was a battle that led to a lot of death, he could make it so that the events leading up to the battle were different in people's minds, thus effectively 'changing' the past. This would also have a significant impact on the present and future in the fanfiction world.
In the original Merlin storyline, Kilgarrah was often a mysterious and somewhat distant figure. When they are mates in fanfiction, it humanizes Kilgarrah to an extent. He becomes more involved in Merlin's day - to - day life. Their relationship becomes more central to the story. Instead of Merlin's adventures being mainly about his role in Camelot and his relationship with Arthur, now his relationship with Kilgarrah also plays a major role. This can lead to new sub - plots. For example, they might have to hide their relationship from some of the more superstitious or anti - dragon characters in Camelot, which adds a new layer of drama to the story.
Merlin might become more confident as Harry Potter. In his past life, he was often hiding his magic, but as Harry, he can be more open in the wizarding world. So he could be more assertive in dealing with challenges.
Well, it changes a great deal. Traditionally, Merlin's origin is somewhat mysterious but not related to Loki. If Loki is his mother in this fanfic, it might introduce elements of Norse mythology into the Arthurian legend. For example, Loki's trickster nature could be passed on to Merlin, making him even more cunning and unpredictable in his magic and interactions. It could also mean that Merlin has a connection to the Norse gods, which might lead to different plotlines like dealing with Norse threats or having allies from that pantheon.
In Merlin fanfiction, fem Harry might become more in tune with the nature - based magic of Merlin's world. Since she comes from a world of more structured spells, she could start to embrace the fluid and often unpredictable magic of Camelot. This change could make her more adaptable and open - minded.
In some fanfictions, Harry Potter might use time - turners in a more extreme way to change the past. For example, he could go back to prevent certain deaths that occurred in the original story, like Sirius Black's death. By changing this event, it could lead to a whole different chain of events in the wizarding world, such as a stronger Order of the Phoenix and a different battle strategy against Voldemort.
He might use his powers over water in some creative ways. Maybe he finds a magical spring that has time - altering properties and uses it to travel back and change things.
It can deepen their bond. The song is full of love and longing, so when Merlin sings it to Arthur, it makes Arthur see Merlin in a new light. He may start to realize the depth of Merlin's feelings for him, whether it's platonic or something more.
Well, if they are brothers in fanfiction, it might make their relationship more equal in some ways. They could be more open and trusting with each other from the start. Instead of the king - servant dynamic, they might share secrets more freely and support each other without the formal barriers. They could also have a more playful relationship, like real brothers do, teasing each other and having inside jokes.
He would become more brooding. As a vampire, he'd have to deal with new emotions like the constant thirst for blood. This would make him more withdrawn from his friends in Camelot at first.
Meeting his father could have made Merlin more confident. Knowing his family background and having his father's presence (even if it was just in the fanfiction) might have given him a sense of belonging. He could also become more powerful, as perhaps his father passed on some knowledge or power to him.