Developing his powers further is also a way. Since he's the son of Nyx, he could learn to manipulate different aspects of darkness like creating illusions using shadows or traveling through the dark realms faster. This would not only make him more powerful but also show his growth as a character as he masters these new abilities.
One major theme is the struggle between different generations of mythological beings. Percy is a more modern hero, while Nyx is from the very beginning of Greek mythology. Their relationship can be seen as a symbol of how the new and the old interact. Additionally, the theme of transformation is often present. Percy might be transformed by his encounter with Nyx, either in terms of his powers or his understanding of the world. And of course, the theme of the night and its secrets, since Nyx is the goddess of the night, is also quite common in such fanfictions.
Well, one possibility could be that Percy discovers his connection to Nyx and has to deal with the powers and responsibilities that come with it. Maybe he has to face some ancient enemies of Nyx who are now after him because of their relation.
One idea could be Percy having to face a new type of monster that is related to Nyx's powers. For example, a shadow - creature that can only be defeated by using the unique abilities he inherits from being the son of Nyx.
He would probably become an even more formidable figure. With Nyx's blessing, he could have enhanced senses during the night, making him a better fighter in the dark. And from Uranus, he might receive a boost in his leadership abilities. Since Uranus was an important god in the Greek pantheon, this could give Percy more influence among the demigods and gods alike. He could be seen as a special agent of change, with the combined powers of these two deities.
One reason it's captivating is the clash of different mythological elements. Percy Jackson comes from a world filled with Greek gods and his own heroic journey. Nyx is a powerful figure from Greek mythology as well. When combined in fanfiction, it creates unique scenarios. For example, Percy's modern - day sensibilities might be put to the test when dealing with Nyx's ancient and often mysterious powers. It also allows for exploration of new relationships and character dynamics that the original Percy Jackson series might not have delved into deeply.
One possible plot for a 'Percy Jackson Champion of Nyx fanfic' would be that Nyx chooses Percy as her champion to stop an ancient evil that is rising. Percy would have to train in the ways of Nyx, which are very different from what he's used to. He'd have to learn to harness the power of the night, deal with Nyx's shadowy minions, and find a way to unite the demigods who are skeptical of his alliance with Nyx. As he delves deeper into this role, he uncovers secrets about Nyx's past and how it ties to the future of the demigod world.
His relationships with other demigods would likely change. They might view him with a mixture of awe and envy. Some might be drawn to him because of the newfound power, while others could be afraid. His friends like Annabeth would need to adjust to this new, more powerful Percy. With the blessings, he might seem a bit more distant as he grapples with his new abilities.
Percy might initially be an outcast among the other demigods. His parentage is quite different from the normal Olympian - related demigods. They might be wary of him because they don't understand his powers. However, some brave demigods could be curious and try to befriend him.
Perhaps Percy discovers a prophecy related to his birth. It could state that he is the key to either saving or destroying the world. This would create a lot of internal conflict for him. On one hand, he has his friends and the people he cares about in the mortal world. On the other hand, his powers and his role according to the prophecy could force him to make some very difficult choices.