One possibility is that Percy sacrifices himself to save his friends and Camp Half - Blood from a powerful, unbeatable enemy like an ancient primordial god. He might use his powers to create a shield or diversion that allows everyone else to escape while he faces certain death.
I'm sorry I can't directly recommend a specific 'Percy sacrifices himself for Artemis' fanfic. But you can try searching on fanfic platforms like Archive of Our Own (AO3). There are tons of fanfics there, and by using relevant keywords in the search bar, you might be able to find one that suits your interest.
Perhaps in the fanfic, there is a prophecy that states only a hero's ultimate sacrifice can save Artemis from a dark curse. Percy, being the selfless hero he is, decides it has to be him. He goes through a series of trials first, trying to find an alternative way but in the end, he has no choice. He sacrifices his life force to break the curse on Artemis. This act not only frees Artemis but also has far - reaching consequences in the Percy Jackson universe, like changing the power dynamics between the gods and demigods.
One scenario could be that they are facing a powerful monster. The monster is about to strike Annabeth, and Percy jumps in front of her at the last moment, taking the fatal blow. Another possibility is that they are in a dangerous situation like a collapsing building or a sinking ship, and Percy uses his powers to ensure Annabeth's escape while he stays behind and perishes.
Well, it's a bit of a gray area. On one hand, fanfic is a form of creative expression. If the author is exploring complex themes like depression, hopelessness, or the toll of heroism, it can be seen as a valid exploration. However, Percy Jackson is a beloved character, especially among younger fans, and such a dark and extreme plot might be disturbing for some.
Well, it could be that Naruto sacrifices himself to seal away a dark and ancient curse that is threatening to destroy not only the ninja world but all of existence. He realizes that his unique connection to the tailed beasts and his strong willpower make him the only one who can perform this self - sacrificing sealing jutsu. So, he says his goodbyes to his friends, family, and the village he loves and gives up his life to save everyone.
Annabeth would be completely devastated. She would probably go into a state of shock at first, then be filled with anger and determination to find a way to bring him back, if possible. She might even go on a solo quest to try and reverse his sacrifice.
There's a fanfic where Percy sacrifices his powers. He does this to stop a powerful enemy from using his connection to the sea to destroy everything. The story delves deep into how Percy feels about losing such an important part of himself and how his friends support him through it. It's really well - written, with great character development for not just Percy, but also his friends like Annabeth and Grover. They all have to adapt to a powerless Percy and still find a way to fight against the odds.
One possible plot could be that Percy is overwhelmed by the pressure of his demigod duties. He has constantly faced life - threatening situations, seen friends die, and felt the weight of the prophecy on his shoulders. In this fanfic, he might see shooting himself as a way to end the cycle of pain and danger for himself and those he loves.
It could be a long - lost Uchiha with powers beyond that of Madara. This Uchiha could have been in hiding, gathering power and knowledge, and his ultimate goal is to reshape the world in his own dark image. Naruto realizes that the only way to stop him is by sacrificing himself.