One common theme is the alteration of the past and its consequences. Since it involves time travel, characters often face the dilemma of whether to change certain events in the wizarding world's history and what the fallout of those changes might be.
One popular 'Harry Potter Unspeakable Time Travel Fanfic' is 'A Time to Remember'. It has an interesting plot where the main character uses time - travel in a way that is both creative and true to the spirit of the Harry Potter universe.
One common theme is the exploration of alternate timelines. For example, Harry might go back in time and change something small, but it has huge ramifications for the wizarding world. Another theme is the mystery surrounding the Unspeakables and their time - travel research. Often, they are portrayed as having secrets that Harry has to uncover.
Harry Potter himself could be a main character. He might use time travel to gain more knowledge about his parents or to change some of the events that led to their deaths.
One idea could be a character going back in time to prevent a major dark wizard event that was overlooked in the original series. For example, they might try to stop the initial rise of Voldemort before he became so powerful.
One great 'unspeakable harry potter fanfic' could be one that focuses on the Unspeakables exploring a new, never - before - seen magical mystery within the wizarding world. For example, a story where they are trying to understand a strange time - warping spell that's causing chaos in Hogwarts. Another might be a fanfic that delves into the relationships between the Unspeakables and other characters, like how they interact with the professors at Hogwarts.
Well, in some fanfics, time travel is more complex. There might be special portals or ancient magic that allows for time travel. For instance, there could be a hidden chamber in Hogwarts that holds the key to traveling through time. And the consequences of time travel can range from minor changes in the present to completely rewriting the future of the wizarding world. Sometimes, characters find that they can't change certain events because they are 'fixed points' in time, much like in some theories of time travel in other science - fiction and fantasy works.
You can start by looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own. Just use the search term 'unspeakable harry potter fanfic' and browse through the results. There are often tags and filters you can use to narrow down your search to find exactly what you're looking for.
In a time - travel Bellatrix fanfic, she might go back to the time when she was first introduced to the Dark Arts. This could show a different side of her, perhaps a more innocent - looking but still dark - inclined Bellatrix. She could interact with younger versions of other Death Eaters and form different alliances that change the course of the future in the wizarding world.
In some Hermione time travel fanfics, she might use time - turners in a more extreme way than in the original books. She could end up in a different era altogether, like the time of the founders of Hogwarts. This would open up a whole new world of magic and mystery for her to explore.