Some fanfictions may take a more AU (Alternate Universe) approach. For instance, they could be in a modern - day setting where they meet in a completely different context, like at a university. This allows for a fresh take on their relationship, as they don't have the pre - existing Hogwarts - related baggage. These types of fanfictions can be really creative and offer a whole new perspective on the Severus Snape and Sirius Black dynamic.
There are fanfictions where they are forced to team up in a situation outside of Hogwarts. This could be in a post - Voldemort world where they have to deal with the remnants of the Death Eaters. In these stories, they slowly start to understand each other's motives and personalities, leading to a new - found respect and sometimes more than that. It's really interesting to see how different authors play with their characters.
I really like 'A Different Kind of Rivalry'. It shows a unique take on the relationship between Snape and Sirius. Instead of just focusing on their enmity from the original series, it creates a scenario where they have to work together and gradually start to understand and care for each other. It's a refreshing read.
There's 'A New Alliance' which is really interesting. In this fanfiction, a magical threat forces Snape and Sirius to work together. Their interactions are filled with tension at first, but as the story progresses, they start to respect and even care for each other in a way that's very engaging to read.
The exploration of their shared past is also a big theme. Since they were at Hogwarts together, fanfictions often go back to their school days to show how their relationship could have been different. And there's the theme of the power of love and friendship in unexpected places. Despite their initial hatred, they find a connection that goes beyond what they thought possible. It shows that love and friendship can bloom even in the most unlikely situations.
There are also fanfictions where they are magically bonded in some way. This bond makes them feel each other's emotions and forces them to deal with their relationship on a much deeper level. They have to learn to tolerate and eventually accept each other, which leads to a very different kind of relationship compared to what we saw in the original Harry Potter books.
Another option is to check out Fanfiction.net. They also have a large collection of fanfictions. Here, you can also use the search function to look for Snape/Sirius Black stories. However, be aware that the interface might not be as user - friendly as AO3 when it comes to filtering. But it's still a good place to start your search.
One popular trope is the 'enemies - to - reluctant - allies'. Given their history of animosity, it's interesting to see them pushed into a situation where they have to cooperate. Another is the 'redemption arc' for Snape, and Sirius being a part of that in some way, either by initially opposing it and then coming around, or being a catalyst for Snape's change.
Another one could be 'Snape and James: Reconciliation'. In this story, it might start from a point of deep enmity between them, but through a series of events, they begin to understand each other better. It often has great dialogue that really brings out the essence of both characters.
One popular Severus Snape crossover fanfiction is 'Snape in the Marvel Universe'. It imagines Snape's magical abilities and complex personality in the context of the Marvel superhero world. Another is 'Snape and the Lord of the Rings', where he might interact with characters like Gandalf, bringing a unique blend of magic systems.
One popular Severus Snape mpreg fanfiction is 'The Unforeseen Bond'. It delves into an alternate universe where Snape experiences an unexpected pregnancy. Another is 'Snape's Hidden Miracle' which has a unique take on how the wizarding world reacts to such a situation. There's also 'Snape's Surprising Journey' that focuses on Snape's emotional growth during the pregnancy.
Well, 'The Prince's Secret' is quite popular. It delves into a different side of Severus Snape's character in a unique way within the fanfiction world. Another one could be 'Snape's Unspoken Desires' which has an interesting take on his relationships and emotions.