Perhaps a plot where Percy gets transported to a different realm within the fanfiction's magic world. In this realm, the rules of magic are completely different. He has to team up with some unlikely allies, like a group of magical creatures he has never encountered before, to find his way back. This would involve a lot of character development as he learns to trust and work with these new companions.
A really cool plot might be Percy finding a long - lost magical artifact that gives him the ability to control time on a small scale. But there's a catch - every time he uses it, he loses a bit of his own memory. He has to decide whether the power is worth the risk while also dealing with enemies who want to steal the artifact from him.
One interesting plot could be Percy having to face a new and powerful magical enemy that is immune to his usual water - based powers. So he has to quickly learn and master new forms of magic to defeat it.
Well, in some fanfictions, there could be a plot where Percy is challenged by an unknown entity to prove his worth as the champion of the hunt. This could involve him having to track down and defeat a series of increasingly difficult foes. Or perhaps a plot where Percy discovers a new aspect of his hunting abilities while exploring an ancient and dangerous forest. He might have to use these newfound powers to rescue his friends who are lost in that forest. It could also be that Percy is sent on a hunt to retrieve a powerful artifact that has been stolen by a rogue demigod, and the journey is filled with various obstacles and battles.
One interesting plot could be Percy having to face a new and powerful monster that is specifically sent by Zeus' enemies to test his worthiness as the so - called 'Champion of Zeus'. This monster could have unique abilities that force Percy to think outside the box and use his powers in new ways.
Well, you could write a fanfiction where Percy Jackson is framed for a crime he didn't commit at Camp Half - Blood. As a champion, he has to prove his innocence while also dealing with the fact that some of his friends start to doubt him. He then embarks on a journey outside the camp, with only a few loyal friends by his side, to find the real culprit and clear his name. This could involve facing various mythological creatures and obstacles along the way.
One possible plotline could be Percy having to face some new and terrifying monsters sent by Nyx's enemies. Since Nyx is a powerful figure, there would be many who oppose her, and Percy, as her champion, would be in the line of fire.
Well, Percy himself is always a memorable character. His courage and quick - thinking in the face of magical challenges make him stand out. Also, any new characters that are created in the fanfiction, like a powerful wizard who mentors Percy in the ways of magic, could be very memorable.
Well, a plot could involve Percy going on a quest specifically for Hestia. He might have to find a special artifact that is related to her. Along the way, he could meet new characters who are also loyal to Hestia. He would face challenges that test his loyalty to Hestia and his understanding of her values. For example, he might have to choose between saving the flame and saving his friends, and his decision would show his growth as a champion of Hestia.
Well, a cool plot might involve Percy being thrust into a situation where he has to mediate between Demeter and another god who has accidentally (or not) damaged one of her main domains. He could be championing Demeter's cause in a sort of divine court. Also, Percy could be involved in a story where he discovers an ancient prophecy related to Demeter that only he can fulfill as her champion, which leads him on a journey filled with mystery and danger.
A great plot for this fanfiction could be Percy being summoned by the spirit of Ouranos himself. Ouranos could give Percy a task to unite all the different factions of demigods, including those who are usually at odds with each other, like the Romans and the Greeks. This would be a huge challenge as there are old grudges and differences in beliefs. Along the way, Percy would have to overcome his own doubts and the mistrust of others. He might also face some magical obstacles that are specifically designed to prevent the unification of the demigods, and he has to use his wits and powers as the Champion of Ouranos to break through them.
One idea could be Percy having to face a series of trials specifically designed by Hera to prove his worth as her champion. For example, he might have to navigate a maze filled with illusions based on Hera's past grudges.
Well, perhaps Percy in the fanfiction is faced with a moral dilemma related to his role as Champion of Styx. For example, he might be asked to make a sacrifice that goes against his principles but is necessary to save the world. Or he could be dealing with the jealousy and suspicion of his friends who don't fully understand his new powers and status. This could lead to some really interesting character development and story arcs.