Perhaps the fanfic focuses on Percy's relationship with the god he is a champion for. There could be internal conflicts as he tries to balance his own values with the demands of the god. He might also have to interact with other demigods who are either jealous or in awe of his new status.
In this fanfic, it could show Percy training under the guidance of the god to become an even greater champion. This training might involve learning new powers or combat techniques that are unique to the god's domain. He could also be sent on a mission to defend the god's territory or interests against other mythological forces, which would lead to epic battles and encounters with strange creatures.
Maybe Percy has to fight against powerful primordial forces that threaten the world he knows.
Well, it could involve Percy going on a quest specifically for Hades. Maybe he has to retrieve something from the Underworld that only he can do as the so - called 'Champion of Hades'.
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.
A powerful mythological creature that has a grudge against the god Percy is championing for. For example, a Titan who was once defeated by that god and now sees Percy as a way to get revenge. It would be a great adversary, with its own set of powers and minions.
Well, it could involve Percy going on a quest in Mars' domain. Maybe he has to retrieve some powerful weapon that was lost there. It could also include him facing off against Mars' enemies or creatures specific to that realm.
A simple plot could be a race against time. They have to reach a certain place before an evil force does. Thalia could use her speed and strength, Percy could use his strategic thinking as a champion, and Zoe could use her knowledge of the terrain to lead them. They might encounter traps and minions of the evil force along the way.
It could involve Percy having to face challenges related to the sun and moon deities. Maybe he has to retrieve a powerful artifact that controls the sun and moon's powers.
One possible plot could be that Percy gradually discovers his godly nature throughout the story. At first, he notices strange things happening around him, like being able to control certain elements without knowing why. As he investigates, he uncovers the truth about his divinity and has to deal with the fact that he's been living a lie.
Well, perhaps Percy discovers some ancient power within himself that gradually transforms him into a god. He might have to face a series of trials to fully ascend, like battling powerful monsters or making difficult moral choices.
The plot might involve Percy having to complete a series of difficult tasks assigned by the gods. For example, he could be sent on a quest to retrieve a powerful artifact that has been lost or stolen.