I'm not sure of a specific one, but a unique plot could involve Shirou's phantasm dragon being able to communicate with other mythical creatures. This could lead to a series of adventures where Shirou has to act as an intermediary between the dragon and these creatures, and they all work together to stop an evil force that is threatening their world.
One interesting 'shirou phantasm dragon' fanfiction could be one where Shirou discovers a hidden power within his phantasm dragon that allows him to travel to different dimensions. In this story, he might meet alternate versions of himself and his friends.
One interesting aspect could be the unique combination of Shirou's character from one universe with the RWBY setting. It might lead to new and unexpected power combinations. For example, how his Noble Phantasm abilities would interact with the Grimm in RWBY. Another aspect could be the exploration of Shirou's character in a different context, perhaps showing different sides of his personality as he adapts to the RWBY world.
Sorry, I'm not really familiar with specific 'shirou rwby noble phantasm fanfiction' titles off - hand. But you can try searching on popular fanfiction websites like Archive of Our Own. They usually have a good collection of crossover fanfictions, and you might be able to find some great ones there.
I'm not sure specifically about 'phantasm adult fanfiction' as the term 'adult' in this context might refer to fanfiction with mature or inappropriate content. However, generally, fanfiction is fictional writing based on existing works. But we should avoid engaging with adult - themed fanfiction due to ethical and moral reasons.
One common theme is power. Shirou often gains new powers or abilities through his connection with the dragon. Another is adventure, as they usually go on quests together.
Adult fanfiction, regardless of the specific type like 'phantasm adult fanfiction', is not something that is considered popular in a positive sense. It often goes against ethical and moral standards. Popular fanfiction usually involves re - imagining characters and stories in a way that is accessible and enjoyable for all ages, without delving into adult - only themes.
One common theme is power. When Shirou dons the dragon costume, he often gains new and extraordinary powers, and the story may revolve around how he masters them. Another theme is identity. The costume can sometimes make Shirou question who he is and how this new form affects his self - perception.
A common theme is friendship. Often, Shirou and the dragon start off as strangers or even enemies, but gradually form a strong bond of friendship. Another theme is power. The dragon usually represents a great source of power, and Shirou may either gain some of that power or learn how to control it.
Well, perhaps in 'shirou gets a dragon fanfiction', the dragon is not just a weapon but also a friend. It could teach Shirou about magic or some ancient wisdom that he didn't know before. They might go on adventures together, exploring unknown lands and facing various challenges along the way. And the dragon could also change Shirou's perception of power and responsibility as he has to take care of such a mighty creature.