A cool plot for Percy Jackson Eclipse fanfiction could be that during the eclipse, all the demigods' memories get jumbled up. Percy wakes up not remembering who he is or his friends. His friends then have to help him regain his memories while also dealing with the chaos that the memory - loss has caused among all the demigods. There could be some internal struggles as well, like Percy having to trust his friends even though he doesn't remember them, and his friends having to deal with this new, somewhat lost Percy.
One idea could be Percy having to deal with an eclipse - related curse. Maybe during the eclipse, his powers go haywire and he has to find a way to control them before he endangers his friends. Another could be a new prophecy that is only revealed during the eclipse, sending Percy and his friends on a dangerous quest.
Well, you could have a story where an eclipse is a portal to a different realm in the Percy Jackson universe. Percy accidentally stumbles through it during an eclipse and has to figure out how to get back. He might meet new characters there, like ancient gods or monsters that were exiled to that realm. And he has to use his wits and powers to survive and return home. This could also lead to a whole new arc in the fanfiction where the knowledge he gains from that realm helps him in future battles in his own world.
The best chapter pointer here is Chapter 26, "Sending My Big Brother to a Transformation Variety Show". It opens with Shen Lan was bent over processing a large stack of press briefs on her... and closes on If you think you can use our family connection to have me handle this....
Chapter 23 is the strongest chapter-level answer because it starts from Although Jiang Li exerted very little strength, Jiang Yan instantly felt... and follows through on However, just as she buried herself in the study, pouring over mysticism....
The best chapter pointer here is Chapter 2, "What Kind of In-laws Are They?". It opens with On the top floor of the Financial Building, a gathering of dark clouds... and closes on Jiang, Lin Manru, turned pale and quickly explained, "It's not eloping, my....
A practical answer is Chapter 31, because it turns the idea into a concrete scene. The chapter opens with Before Shen Lan had reached the backyard, she already heard the sounds of..., adds pressure through And judging from the photo, she was also a stunning natural beauty!, and ends on After.
If you want the clearest chapter reference, go to Chapter 84. Early on, When the villagers tasted his curry beef one by one, their faces revealed...; later, the chapter leans on In the end, he could only secure a score of 5..
Look to Chapter 28 for the clearest answer. It begins with The next evening, Jiang Yan drove home seething with rage., keeps building through Before he even entered the dining room, he shouted angrily, "Lili, you did..., and lands on Lili then kicked his knee hard..
Chapter 45 is the strongest chapter-level answer because it starts from Helplessly, Jiang Yan had no choice but to step on the accelerator. and follows through on The guests have to go through so many troubles on the way, while these....
A practical answer is Chapter 31, because it turns the idea into a concrete scene. The chapter opens with Before Shen Lan had reached the backyard, she already heard the sounds of..., adds pressure through And judging from the photo, she was also a stunning natural beauty!, and ends on After.
The best chapter pointer here is Chapter 37, "Those in the know anticipate the transformation, while the oblivious think it's a fashion show.". It opens with The barrage was suddenly filled with hahas, but the two guests present...
A practical answer is Chapter 55, because it turns the idea into a concrete scene. The chapter opens with Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had..., adds pressure through This person was even a top gaming streamer with tens of millions of fans,..., and ends on.