Another idea is Percy getting involved in a conflict between Oceanus and other powerful sea deities. This could put him in a difficult position where he has to choose sides or find a way to make peace. He may have to use his wits and newfound powers to navigate this complex situation.
One plot could be Percy exploring his unique powers as the son of Oceanus. He might discover abilities that are different from the regular demigods. For example, he could have a special connection to the deeper parts of the ocean that no one else has.
A possible plot could involve Percy being sent on a quest by Oceanus to retrieve a powerful artifact lost in the ocean. Along the way, he meets new sea creatures and forms alliances. He also has to deal with the fact that some sea beings don't trust him because he's an adopted son, not a true - born of Oceanus. This creates internal and external conflicts for him as he tries to prove himself worthy.
One idea could be Percy exploring his new powers related to Oceanus. Since Oceanus is a primordial god of the ocean, Percy might have an even deeper connection to the sea and be able to control more extreme oceanic phenomena like underwater volcanoes. Another plot could involve Percy facing conflict within the demigod community as his new heritage changes the power dynamics. Some might fear his increased power, while others might want to use him for their own gains.
In this fanfiction, it's likely that Harry's life takes a very different turn. As the son of Oceanus, he could have an entirely different set of magical abilities. He might be able to communicate with sea creatures, control the tides, or even have a special bond with the underwater world. His story could explore how he balances his newfound powers and identity with his existing life as a wizard in the wizarding world. There could be a lot of self - discovery as he tries to understand what it means to be the son of such a powerful being.
There could be a power - hungry sea witch who wants to use Percy's connection to Oceanus for her own gain. If Percy refuses, she becomes an antagonist. Additionally, some of the more traditionalist sea tribes might view Percy as an outsider and try to drive him out, acting as antagonists in the story.
Percy as the son of Oceanus might be more aloof. Since Oceanus is a primordial god, Percy could inherit a sense of distance from the more common demigod affairs. He might be more focused on the grander scale of the ocean's well - being rather than the day - to - day problems of the demigod camp.
One possible plot could be Percy getting a special power from Apollo's blessing. For example, he might gain the ability to heal faster, which would be really useful in his battles. He could use this new power to save his friends in a dangerous situation, like when they are facing a powerful monster and his friends are severely injured.
Perhaps a plot where Percy is summoned by Khione to help her with a problem in her icy realm. There, he meets other children of Khione and they have to work together to stop a dark force that is melting the ice in her domain. Percy uses his skills as a demigod and his unique heritage to come up with a plan to save the day.
Well, a plot could be that Percy is kidnapped by a sorcerer who has a vendetta against Poseidon. The sorcerer thinks that by taking Percy, he can get revenge on the sea god. Another could be that some jealous demigods from another camp, who feel overshadowed by Percy's fame, kidnap him. They might try to make him look bad in front of the other demigods. Also, it could be that a mysterious force from the Underworld kidnaps Percy because they fear his growing power and want to keep him out of the way.
One possible plot could be Percy being stuck in a time loop where he has to keep saving Artimis from a recurring threat. Maybe a powerful Titan is constantly finding new ways to capture her, and Percy has to figure out the pattern within the loop to stop it for good. Another idea is that the time loop is a result of a curse placed on Artimis, and Percy has to team up with the hunters of Artimis to break the curse before the loop consumes them all.
In a time travel fanfiction, their son could go back to the moment when Jon and Daenerys first met. He could subtly change their initial interactions to make them trust each other more quickly. This could lead to a stronger alliance from the start. He could also travel to the times when they faced their biggest challenges individually and offer solutions. For example, when Daenerys was dealing with the slavers in Slaver's Bay, he could give her ideas on how to end slavery more effectively and gain more loyal followers, which would have put her in a better position when she reached Westeros.