A lesser - known but very creative fma envy crossover fanfiction is the one that combines the world of FMA with a steampunk - themed universe. Envy has to adapt to the new rules and technology in this world, and the story does an excellent job of showing this transformation.
One common theme could be the exploration of envy's character traits. In Fairy Tail fanfiction, Envy from FMA might be inserted into the Fairy Tail universe, and the theme could be about how their powers interact. Another theme could be the conflict that Envy brings to the Fairy Tail world, perhaps causing chaos among the mages.
Check out some FMA fanfiction review blogs as well. These blogs often feature and recommend different types of fanfictions, including the crossover ones with Envy. They might give you a good idea of which ones are worth reading.
One plot idea could be Envy being forced to confront his own envy in a very personal way. Maybe he sees someone with a life he secretly desires and it makes him question his own actions. Another could be a story where Envy has a change of heart due to an unexpected encounter, like meeting a kind-hearted human who doesn't immediately judge him.
To write a good one, start with research on Fullmetal Alchemist lore. When it comes to Envy, explore his backstory in the series. For the lemon elements, build up the sexual tension gradually. For example, use meaningful glances and small touches between the characters at first. As for the overall story, create conflict and resolution. Maybe Envy has to overcome his own nature to be with the other character in the fanfiction. This will make the story engaging and the lemon part more meaningful.
It can add new plot elements. For instance, Envy's presence might introduce new conflicts that the Fairy Tail characters have to face. This could change the direction of some story arcs in the original Fairy Tail.
The Japanese translation of the phrase 'only envy, forget envy, not envy immortals' was 'only envy, forget envy, not envy immortals.'
This idiom came from a poem in Dream of the Red Chamber," Envy only mandarin ducks, not immortals." It meant that one only envied mandarin ducks, not immortals. This idiom is often used to describe people who only pursue worldly pleasures and do not care about morality and ethics or do immoral things just to satisfy their curiosity.
The FMA manga ended with a powerful conclusion. All the loose ends were tied up, and the characters' journeys came to a meaningful conclusion. It left fans with a mix of emotions - happiness for the characters' growth and a bit of sadness to say goodbye.