One possible plot could be Percy's struggle to balance his two powerful heritages. He might face challenges from both the forces of Chaos and the underwater world of Poseidon. For example, the denizens of the deep might be wary of his Chaos side, seeing it as a threat to their ordered underwater society. Meanwhile, the chaotic entities could try to pull him fully into their realm, away from his connection to Poseidon.
His powers could develop in a very unique way. Since he has the blood of Chaos, his powers might start off as small, random bursts of energy. For example, he might accidentally create small pockets of chaotic space. As he learns to control his Poseidon powers, like controlling water, he could start to merge the two. He might be able to make the water act in chaotic ways, like creating whirlpools that have unpredictable movements.
In some fanfictions, Percy being the son of Chaos and Poseidon is a really cool concept. It often gives him even more power. He might be able to control not just water like a son of Poseidon but also have some chaotic powers. For example, he could disrupt the order of things in a battle, or create portals to different realms which are abilities not typically associated with a normal demigod.
I'm not entirely sure as it could be about many things. It might be a fan - created story where Percy is portrayed as the son of Chaos. Maybe it involves Percy having special powers or going on unique adventures because of his relation to Chaos.
One common ability is enhanced water manipulation. Since he's still related to Poseidon, his control over water becomes supercharged. He could do things like create massive tidal waves with just a thought. Another ability is the power to manipulate chaos energy. This might be used to distort reality around him, making it difficult for enemies to attack him directly.
One common theme is family. Since Percy is the son of Poseidon and Amphitrite is Poseidon's wife, it often explores how Percy fits into this new family structure. Another theme is power. Percy already has his own powers from Poseidon, and Amphitrite being a goddess also has great power, so how their powers interact is often explored.
One interesting fanfic could be where Percy has to deal with the complex politics of having two powerful parents. He might struggle to find his place among the demigods who have more traditional parentage. For example, some might be jealous of his unique heritage, while others might fear his potential power.
The plot might involve Percy trying to bring peace between Poseidon and Athena. There could be some ancient feud between them that Percy is determined to end. He could start by finding common ground between the two deities in their respective domains, like the sea and wisdom. Along the way, he would face many obstacles, including other gods and goddesses who don't want the peace to happen.
Well, it would first of all bring two very different aspects of Greek mythology together. Percy represents the more heroic, chaotic side of Poseidon's descendants. Artemis is all about the hunt, chastity, and the moon. Their union in a fanfic could create new power dynamics. For instance, new magical abilities might be created from their combined influence. Maybe there could be a new form of magic related to water and the moon.
One possibility could be a story where Percy and Artemis have to team up for a quest. Maybe there's a new threat to the world of the gods and their combined powers are needed. Percy's skills as a son of Poseidon in controlling water and Artemis's archery and connection with the moon could be crucial in defeating this new evil.