One great 'Naruto Snake Sannin Fanfiction' is 'The Serpent's Legacy'. It delves deep into the backstories of the Snake Sannin and their impact on Naruto's world. The author weaves a complex plot with amazing character development.
Fanfiction.net is a great place to start. There are tons of 'Naruto Snake Sannin Fanfiction' there. You can search by tags like 'Snake Sannin' and 'Naruto' to find relevant stories.
There could be many interesting fanfictions involving Harry Potter and a snake. Maybe the snake is a magical creature with special powers that helps Harry in his adventures. For example, it could lead him to hidden secrets or protect him from dark wizards.
One possible plot could be that the snake is a key to unlocking an ancient prophecy. Harry discovers the snake and realizes it has markings that match an old legend. He then has to protect the snake from Voldemort who wants to use it for his own evil purposes.
One possible fanfiction could be that Orochimaru in his snake form slithers around Sakura while she is in a forest training. Sakura, being the strong - willed ninja she is, doesn't show fear but instead tries to analyze Orochimaru's motives. She might be on a mission to retrieve some important information related to Orochimaru's experiments, and this encounter is an unexpected turn. As Orochimaru coils around her, she uses her medical ninjutsu knowledge to try and find a weak point in his snake form.
Perhaps they are three young wizards from a far - off land. They could be from a place where magic is practiced differently, like a tribe deep in the Amazon where they use magic to communicate with animals. So when they come to Hogwarts, they have a lot to learn and also a lot to teach. They might have unique magical abilities that are rare in the Hogwarts world, such as the ability to control the weather without a wand.
One plot idea could be that Orochimaru, in his snake form, coils around Sakura while she's on a mission alone. She manages to use her medical ninjutsu skills to fend him off. Another could be a scenario where Orochimaru is actually protecting Sakura from other threats while coiling around her in a strange, yet protective way. Maybe there's a curse on Sakura and Orochimaru's coiling is the only way to suppress it for a while.
The plot could involve Orochimaru using his snake form to trap Sakura as part of a test. He wants to see how she will react under pressure. Sakura, being resourceful, uses her surroundings to her advantage. She might break a nearby branch and use it as a weapon against the snake form. This could lead to a series of exchanges where Orochimaru is impressed by Sakura's tenacity and starts to have second thoughts about his initial intentions towards her.
Sakura could react with fear at first. After all, Orochimaru is a very dangerous and unpredictable character. But then she might gather her courage and try to use her strength to break free. She could use her punches, which are quite powerful, to hit Orochimaru's snake body.
It could be Jiraiya. He has a really strong bond with Naruto already. He's taught Naruto a lot in the original story too. So in the fanfic, his training could be the most in - depth, covering things like advanced rasengan variations and how to fight against really powerful enemies. His influence on Naruto's character development would also be significant.