A cool plot could be that an ancient prophecy foretells of a union between an Etherious and Natsu Dragneel that will either save or destroy the magical world. Natsu is then hunted by different factions, some who want to force this union for their own gain, and others who want to prevent it at all costs. Meanwhile, the Etherious in question is also on a journey of self - discovery and they cross paths with Natsu. They start off as enemies but gradually realize they have to work together to face the real threat which is a hidden, all - powerful dark force that has been manipulating events from the shadows.
One idea could be Natsu from Fairy Tail finding himself in a parallel universe where he is an Etherious. He has to deal with the new powers and the darker side of himself while still trying to find his way back home. Another could be an Etherious teaming up with Natsu to fight a common enemy that threatens both their worlds. Maybe a powerful dark mage who wants to use the power of the Etherious and also destroy Fairy Tail.
Definitely Zeref. Since he has a connection to the Etherious and also to Natsu in the original Fairy Tail story. Another good character could be Gray Fullbuster. His ice - magic could contrast well with the more chaotic and dark powers of the Etherious. Also, Mavis Vermillion could be included. Her wisdom and powerful magic could play a role in helping Natsu deal with the Etherious side of things.
One great 'etherious natsu dragneel and lucy fanfiction' is 'A Bond Beyond Magic'. It beautifully explores their relationship in a world where they face new and unexpected magical challenges together. The way it develops their characters and the unique magical situations they encounter make it a very engaging read.
A theme that is quite prevalent is the idea of sacrifice. In many fanfictions, either Natsu or Lucy is put in a position where they have to sacrifice something for the other. It could be their own safety, their magic, or their dreams. Also, the theme of growth is common. They both grow as characters, learning more about themselves and each other as the story progresses. This growth can be in terms of their magical abilities, but also in their emotional maturity.
I really like 'Etherious Natsu's Adventure'. This fanfic takes Natsu on a journey where he has to face some of the darkest secrets of his past as an Etherious. It's well - written with a lot of action and emotional moments. For example, there's a part where Natsu confronts a figure from his forgotten past, and the way it's described is really engaging.
Well, in these fanfictions, the concept of the Etherious is really interesting. It allows for a lot of creative exploration. For instance, we can see different interpretations of how Natsu's Etherious nature affects his relationships with other guild members. Some fanfictions show him having to struggle with his darker side, which makes for a great read. Also, fans love to see Natsu in new and exciting situations that the original series might not have covered, like facing ancient evils related to his Etherious origin.
Perhaps in the fanfiction, a cold - personality Natsu has lost his memories of his former self. He becomes a loner who is feared by many because of his icy demeanor. The story could then revolve around a character trying to help him regain his memories and bring back his old self. For example, Lucy could find an ancient spell that might restore his memories but has to go through many trials to use it.
One plot idea could be that Natsu's little sister discovers a new and powerful form of magic that no one has ever seen before. She then has to learn to control it while also facing off against an evil wizard who wants to steal her power for himself. Another idea is that she goes on a journey to find out more about their family's past, which leads her to uncover long - lost secrets and reunite with long - lost relatives.
One thing that might make it unique is the combination of different fictional universes. Naruto and Etherious come from very different settings, so the crossover itself is distinct. The character of Dragneel could add another layer of uniqueness if he has a special role or ability in the story.
One idea could be Natsu from Fairy Tail ending up in a different anime world like Naruto and having a harem of both Naruto and Fairy Tail characters. For example, Sakura could be attracted to his unique magic, while Lucy from Fairy Tail is also part of the harem, leading to some comical and action - packed situations as they all deal with different threats in the crossover world.
Perhaps Natsu's presence could disrupt the balance between the three factions in the Highschool DxD world. His strong sense of justice might lead him to oppose some of the more underhanded dealings among the devils, angels, and fallen angels. This could start a chain of events where he has to prove himself and his beliefs to the various characters.