One interesting concept could be a dark version of the Fairy Tail guild. For example, the characters might have their personalities twisted in a nightmare scenario. Maybe Natsu becomes a cold - hearted character instead of his usual warm - hearted self.
First, focus on creating a really dark and foreboding atmosphere. Use descriptive language to set the mood, like 'The sky over Magnolia was a blood - red, as if the world itself knew of the approaching nightmare.'
A prevalent theme is the battle against evil versions of his friends or himself. In a nightmare fanfic, the author might create a scenario where Natsu has to fight an evil Natsu or his friends who have been corrupted. This theme adds a lot of drama and action. It also tests Natsu's loyalty and his ability to see the good in his friends even when they seem to be his enemies.
One possible plot could be that Natsu's nightmare is related to losing his friends. In the nightmare, he might see Fairy Tail being destroyed and his friends being hurt or disappearing. This could lead to him waking up in a panic and then being extra protective of his guildmates in the real world.
First, understand Lucy's character well. Know her strengths like her Celestial Spirit magic and her weaknesses such as her insecurities. Then, for the nightmare part, think of what would truly terrify her. It could be the loss of her friends or her magic. Build a vivid setting for the nightmare, whether it's a dark and twisted version of Magnolia or an otherworldly place.
One interesting 'Fairy Tail Lucy Nightmare' fanfiction could be about Lucy being trapped in a nightmare world created by a dark mage. In this world, her friends are turned against her, and she has to find a way to break the spell. It often plays on the themes of friendship and self - discovery within the context of a nightmare scenario.
To create a creepy atmosphere, the author should focus on the unknown. Instead of showing the source of danger right away, keep it hidden. Let Natsu (and the readers) feel the presence of something malevolent without knowing exactly what it is. For example, there could be a feeling of being watched all the time. The author can also use color symbolism, like using a lot of dark, muted colors to represent the nightmare world. And by making Natsu feel helpless, like he can't use his magic effectively, it adds to the sense of dread.
By showing his vulnerability in the nightmare. Natsu is often seen as strong and fearless. But in a nightmare, he can be scared. This contrast can reveal his deeper emotions and fears that he usually hides.
It adds more content. The official Fairy Tail series has a limited number of episodes and chapters. Fanfiction fills in the gaps. For example, it can create stories about what the characters were doing during the time - jumps in the original story.
If Lucy never joined Fairy Tail, the friendships and relationships among the characters would form in a very different way. Also, many of the story arcs might not unfold as they do in the original plot.