Yes, it is a somewhat common theme in some fanfictions. One reason could be the complex relationship between Harry and Snape in the original series. Snape was often cruel to Harry, so in some alternate universes, writers explore the extreme scenario of Harry killing Snape. It also allows for exploring darker aspects of Harry's character and the consequences of such an act within the wizarding world.
There were a few Xianxia novels with decisive protagonists that were worth recommending. Amongst them," The Battle of the Great Dao " was a fantasy Xianxia novel that focused on the fight for resources. The protagonist was decisive in killing, both wise and brave, and constantly worked hard to pursue the Great Dao. The plot of this novel was compact, the writing was smooth, and the characters were lively. It was suitable for readers who liked traditional Xianxia novels. In addition," Immortal Mortal " was also a Xianxia novel that was decisive in killing. The protagonist relied on his methods and brains to advance bravely, cutting through the clouds and thorns, showing the image of a strong person. The plot of this novel was reasonable and the writing was excellent. In addition," Evergreen Immortal Dao " was also a Xianxia novel with a decisive protagonist. The protagonist took one step at a time in the world of cultivation, breaking through all kinds of difficulties and finally achieving Dao. This novel was based on the cultivation of the family. The plot was plain but charming. These are the recommendations of a few Xianxia novels where the main characters kill.
Well, writing a 'zeus kills percy' fanfiction could be a way for the author to delve into the themes of mortality and power in the Percy Jackson universe. In the original series, Percy is often seen as invincible in a sense, so by having him killed, it makes the world seem more dangerous and unpredictable. It also allows the writer to rewrite the story in a completely new direction, perhaps exploring a post - Percy world where new heroes or anti - heroes emerge. It might also be a way to comment on the flaws in the existing power structure within the mythological world of the series.
It could also be an exploration of character development in extreme situations. What would Edward become if he did such a thing? How would the other characters change? Writers might use this extreme scenario to show how the characters would react and grow, or in this case, maybe degenerate in a different way compared to the original story.
It could be an exploration of the theme of power and how it can corrupt even the most noble of heroes. Batman, with his vast resources and skills, might be written in this fanfiction as having a moment of extreme weakness or paranoia. Dick Grayson, being his protege, might be seen as a symbol of his own potential failure, and in a moment of self - destruction, Batman kills him. This also allows the writer to delve into the consequences and reactions of the other characters in the Bat - family and the wider DC universe.
Some writers might want to explore dark and extreme scenarios. It's a way to break the norms of the usual heroic storylines. They may be interested in seeing how the characters and the Marvel universe would react to such a tragic event.
It could be a creative exercise in exploring how a single event, like Kushina killing Naruto, would change the entire Naruto universe. Writers might be interested in seeing how other characters would react, how the story would progress without Naruto, and how the themes of the original story would be altered. For instance, the theme of friendship and mentorship would be severely affected. It's also possible that the writer wants to shock the readers and make them think about the characters in a completely new light.
It's not a very common theme. Naruto is usually depicted as a hero who respects and protects his comrades, and Tsunade is an important figure in the Naruto universe. However, some fanfiction might explore such a dark theme to create an alternate universe or a shock factor. Maybe the author wants to explore how Naruto could be corrupted or misdirected in a different storyline.
In some fanfiction, it could be related to a misinterpretation of character relationships. Maybe the author has a skewed view of Naruto and Sakura's dynamic and decides to create a tragic and unexpected turn of events where Naruto kills Sakura to show the breakdown of their bond.
It could be a plot device used to create shock or add a complex layer to Naruto's character. Sometimes, authors take creative liberties to explore unconventional aspects of characters.