His life would be very different. He'd likely be living in a much darker and more mysterious environment. The powers he'd be exposed to would be more primordial in nature. He might have to deal with the shadows and secrets that come with being part of Nyx and Erebus' world.
In this fanfiction, Percy could also become a sort of bridge between different worlds. His human experiences combined with his new family in the realm of Nyx and Erebus could allow him to bring about changes. He might be able to use his knowledge of both worlds to resolve conflicts or create new alliances. For instance, he could help the Olympians understand the primordial forces better, or vice versa.
The theme of identity is also quite prevalent. Being the son of such powerful and somewhat mysterious entities, Percy might struggle with his own identity. Is he more like his father, Erebus, associated with darkness and shadow, or his mother, Nyx, the night? Fanfictions often play with this idea, showing his journey to understand who he is and where he fits in the grand scheme of the mythological universe.
One common theme is the struggle with identity. Since Percy is the son of Erebus and Nyx in these fanfictions, he often has to grapple with being different from the 'canon' Percy. Another theme is power. Given his new parentage, he might have different or enhanced powers, and the fanfictions often explore how he uses or controls them.
With the other demigods, Percy could become an outcast at first. They might see his adoption by Erebus as something unnatural or dangerous. But as time goes on, if Percy uses his new powers and influence for good, he could gradually regain their trust and respect. For example, he could use his shadow - related abilities to help in battles or rescue missions, showing that he's still on their side.
Another plot could involve Percy being drawn into a quest related to the primordial world of his new parents. Maybe there's an ancient threat that only someone with his unique heritage can stop. This would take him to places like the Underworld in a whole new light, as he has a deeper connection to the primordial darkness there.
You can start by looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a wide variety of fanfictions. Just search for 'Percy Jackson Son of Erebus and Nyx' in the search bar, and you'll get a list of relevant stories. You can also check out some Percy Jackson - related forums where fans might share and recommend such fanfictions.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). There are often many works dedicated to various mythological fanfictions. Just search for 'Percy son of Erebus and Nyx' in the search bar, and you'll likely find a selection of stories to choose from.
Perhaps a really interesting plot twist could be that Percy's adoption by Erebus reveals a long - lost prophecy. This prophecy states that Percy, with his combined heritage of being Poseidon's son and Erebus' adopted son, is the key to either the destruction or the salvation of the entire Greek mythological world. This would put Percy in a very difficult position as he tries to figure out how to fulfill the prophecy in the best way possible, all while dealing with the reactions of other gods, demigods, and mythical creatures.
One key element is their primordial nature. As two of the earliest entities in Greek mythology, their love was part of the foundation of the cosmos. Another is the fact that their union led to the birth of other important deities. For example, the creation of Aether and Hemera came from their relationship.
In Greek mythology, Nyx and Erebus' love story is quite fascinating. Nyx, being the personification of night, and Erebus, the embodiment of darkness, they came together in a very primordial way. Their love was a part of the fabric of the early universe in Greek beliefs. Their union was a source of new things in the cosmos. For example, it led to the creation of day (Hemera) and light (Aether). Their love was more than just a romantic relationship; it was a crucial part of the mythological creation story.