The concept of Danny's ghostly abilities meshing with the magic of the Fate universe is really interesting. His powers, like intangibility and flight, could give him an edge in battles against Servants. For example, he could use his intangibility to avoid attacks that would normally be deadly.
Another interesting concept is the idea of Danny being a wildcard in the Holy Grail War. Since he's not from the normal Fate universe, he could disrupt the usual order of things. He might not be interested in the Grail itself but gets dragged into the conflict because of his sense of justice or because he's mistaken for someone else who should be in the war. This could lead to all kinds of plot twists and new alliances forming.
One more fascinating concept is how the characters from Danny Phantom would view the complex moral and ethical codes in Fate Stay Night. Danny, who is used to fighting ghosts in his own world, might find the idea of Servants and Masters and the sacrifices involved in the Grail War very strange. This difference in worldviews could create a lot of internal and external conflict within the fanfiction, which is always engaging to read.
Another aspect is the exploration of different endings. Fanfiction can take the Fate Stay Night system and create new storylines that lead to unique conclusions. Maybe a scenario where the Holy Grail War has a completely different outcome, like all the Servants teaming up against a new, unexpected threat.
One interesting concept could be unique interpretations of the Holy Grail War. For example, an OC might have a special ability that changes the dynamics of the war completely. Another could be new relationships between OCs and the existing characters from the Fate Stay Night universe. Maybe an OC forms an unexpected alliance with a Servant, which leads to a whole new storyline.
In this fanfiction, an interesting aspect could be the new ways of summoning Servants. Instead of the traditional methods, the gamer aspect might introduce a system where Servants are summoned based on in - game achievements or levels. This could bring in Servants that are not typically seen in the original story, creating fresh and unexpected interactions.
One interesting concept could be the crossover of character abilities. For example, how a Fate Stay Night character might adapt to the world of RWBY and use their magic in a combat system dominated by Dust and Semblances. Another concept might be the exploration of different character relationships. Characters from both universes could form unique friendships or rivalries that are not present in their original stories.
You could also check out fanfiction.net, though the selection might be a bit more limited compared to AO3. Look for stories that have a high number of reviews and favorites as these are often indicators of well - written and engaging fanfictions. Some fanfictions might take a more comical approach, like Danny accidentally getting summoned as a Servant, which could lead to all sorts of hilarious misunderstandings and adventures.
Some interesting concepts in highschool dxd fanfiction include new forms of peerage systems. For instance, a fanfic could introduce a modified version where there are more diverse types of members. In fate stay night fanfiction, the concept of the Grail War taking place in a different setting, like a modern - day metropolis other than Fuyuki, is fascinating. In the context of fanfiction that combines both, a concept could be the use of Highschool DxD's magic system in the Fate universe, or vice versa, which could lead to really unexpected and exciting story developments.
One interesting concept could be how the original Fate Stay Night mechanics interact with the gamer OC. For example, the OC might have unique abilities that change the way the Holy Grail War is fought. Maybe they can level up in a way similar to a game, which gives them an edge over traditional Servants and Masters.
One interesting concept could be how the gamer elements interact with the existing Fate Stay Night universe. For example, the protagonist might have a gamer interface that shows stats for the Servants, which could add a new layer of strategy to battles.
One interesting concept is how characters' fates might change if they had prior knowledge from time travel. For example, Shirou might be able to prevent some of the tragedies that occur in the original story. Another concept could be the interaction between different time periods' versions of the same character, like how a past Archer could meet a present - day Shirou and how their ideologies would clash or align.
One interesting concept could be the unique gaming mechanics that are incorporated. For example, how the characters' abilities are translated into gaming skills. It might also include new types of magic or powers that are designed with a gamer's perspective in mind.