In this fanfiction, it could be that the snake is from a different magical realm. Harry befriends it, and together they explore the differences between their two magical worlds. The snake might introduce Harry to new spells and magical creatures from its own realm. This would be a great opportunity for Harry to expand his knowledge of magic and also learn about different cultures within the magical universe. He could also face opposition from some in the wizarding world who are afraid of the unknown that the snake represents.
One possible plot could be that Harry discovers the snake has some special magical abilities that are unknown to most wizards. For example, it can lead him to hidden magical artifacts. Another plot might involve the snake helping Harry understand Parseltongue better and use it in unexpected ways to solve mysteries at Hogwarts.
It could also be a snake from the Forbidden Forest. There are many unknown and mysterious creatures in there. A snake from that forest might be more in tune with the natural magic of Hogwarts. Harry, being the curious and kind - hearted person he is, might come across it during one of his adventures in the forest and start a friendship with it.
Perhaps the snake familiar is from a different magical dimension. It has knowledge of magic that is unknown to the wizarding world of Harry Potter. As Harry bonds with it, he learns new spells and techniques that give him an edge in his battles. For instance, it could teach him how to manipulate time on a small scale, which he uses to outwit his foes.
Well, one possible interesting plot could be the discovery of a new kind of magic related to the poisonous snake. Maybe the snake has a unique power that can either help or harm the wizarding world.
One possible plotline could be that Harry discovers a way to communicate with Death as an entity. Maybe he stumbles upon an ancient magic that allows him to have conversations with Death. Through these interactions, he gains a deeper understanding of life and death, and this new knowledge helps him in his battles against Voldemort. For example, Death could give him insights into the Horcruxes and how to destroy them more effectively.
One possible plot could be that Naruto discovers a hidden ability within himself that allows him to communicate with Kurama on a deeper level much earlier. This leads to them teaming up to protect the village from a new and unexpected threat. For example, a group of rogue ninjas who have a special jutsu that can disrupt the chakra flow of the entire village. With Kurama's power and Naruto's determination, they manage to defeat the rogues and in the process, their friendship becomes stronger.
In some Harry Potter 8 fanfictions, there are plots where the characters continue to face new dark magic threats. For example, a new dark wizard might emerge, and Harry, Hermione and Ron have to use their combined skills and knowledge to defeat this new foe. Another plot could be about the exploration of the wizarding world's past in more depth, revealing secrets that were previously unknown.
Perhaps the snake is a transformed wizard who was cursed. This would lead to a plot where Harry has to find a way to break the curse. He might have to go on a quest to find rare ingredients for a potion. Along the way, he and the snake face various challenges, like dark wizards trying to stop them, and they form a strong friendship through their shared experiences.
Some fanfictions focus on the snake as a misunderstood creature. In this type of story, the snake is constantly misjudged by the wizarding world. Harry, being the empathetic character he is, befriends the snake and discovers that it has a heart of gold. They then go on adventures together, with the snake using its unique abilities like slithering into small spaces to retrieve magical items for Harry.
Another plotline might involve Harry learning ancient goblin magic from his new friends. This could give him an edge in battles against the Dark Arts, as it's a type of magic not commonly known in the wizarding world. He could then share some of his own wizarding knowledge in return, strengthening the bond between them.
One interesting plot could be about the Potter family's hidden secrets being unearthed. Maybe there are ancient spells or prophecies related to them that no one knew before. Another could be a story where the Potter family has to face a new and powerful dark force that is specifically targeting them due to their legacy. And a third plot might involve time - traveling within the Potter family's history to correct past mistakes or learn from them.