Well, one possibility could be that Percy is reluctantly drawn into Khione's service. Maybe she offers him a deal to save his friends or Camp Half - Blood from some greater threat. The plot could involve Percy having to use his unique skills and powers in ways that go against his usual moral code at first, but as he learns more about Khione's true motives, he finds a way to turn the situation around and defeat her in the end.
Well, there could be some ice - related monsters or creatures that serve Khione. For example, ice giants or frost - breathing serpents. These could be constantly attacking Percy or trying to prevent him from achieving his goals while he's Khione's champion. Also, there might be some jealous demigods who think Percy is getting special treatment from Khione and they become antagonists by trying to sabotage him.
Well, one possible plot could be Percy struggling to adapt to his new 'mother' Khione. He might have to deal with her cold and often unfeeling nature. For example, she could be trying to train him in her own ways which are very different from what he's used to at Camp Half - Blood. Maybe she wants him to use his powers in a more aggressive way to serve her own purposes.
Well, one possible plot could be Percy discovering his new heritage as the son of Khione. He might struggle to come to terms with it at first. Maybe he has new powers related to ice and snow that he has to learn to control. He could also face challenges from the other demigods who are skeptical or even hostile towards this new revelation.
One possible plot could be Percy discovering new powers bestowed upon him by Hecate. He might have to use these powers to navigate a mysterious underworld realm filled with strange creatures. Along the way, he could meet new allies who are also under Hecate's influence.
Well, one possibility could be that Percy is chosen by Aphrodite for a special mission. Maybe he has to use the powers of love and charm in a unique way. For example, he might need to convince a group of warring mythical creatures to make peace by appealing to their feelings. He could find himself in situations where his normal combat skills aren't enough and has to rely on Aphrodite - given abilities like enhanced persuasion.
Maybe Percy discovers that there is a conspiracy within the Underworld to overthrow Hades. As the champion, he has to uncover the truth and stop the plot. Along the way, he meets old enemies who now see him as an ally of Hades and try to take advantage of the situation.
One possible plot could be Percy Jackson being chosen by Apollo to complete a special quest. Maybe he has to retrieve a lost artifact of Apollo that is crucial for maintaining the balance between the gods. Along the way, he might face various monsters and challenges, like fighting against the minions of a dark god who wants to use the artifact for evil purposes.
In such a fanfiction, Percy might gain new powers. Since Khione is the goddess of snow, Percy could be blessed with ice - related abilities. For example, he could control ice, freeze water in a unique way, or even withstand extremely cold temperatures better than before. This would change the way he battles enemies and interacts with his environment.
I'm not sure specifically as there can be many different fanfictions with this title. But generally, it might involve Percy Jackson in some new adventures related to chaos. Maybe he has to face new threats or make alliances in a world where chaos is a major factor.
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'.