How could a time travel plot work in a Harry Potter fanfiction with Tom as a mate?

In a time - travel Harry Potter fanfiction where Tom is a mate, it could be that the time traveler goes back to Tom's Hogwarts days. The traveler might find themselves in Slytherin, just like Tom, and they start to bond over their shared interests in magic and knowledge. They could then work together on various magical projects, and the traveler could subtly influence Tom to make better choices, like not delving too deep into the Dark Arts.

One possible plot could be that Tom and Harry accidentally stumble upon a time - turning device. They are transported back to a crucial moment in wizarding history, like the founding of Hogwarts. There, they meet the four founders and have to navigate the complex relationships and magic of that era without changing history too much. Maybe they help solve a mystery that was lost to time.

In some fanfictions, time travel works through special magical artifacts. For example, the Time - Turner is often used in more elaborate ways than in the original books. It might be able to send a person not just back a few hours, but years or even centuries. In other stories, certain powerful spells can open up time - travel portals. These spells are usually very difficult to master and often have dangerous side - effects if not cast correctly.

It could work through a time - turner like device. Maybe an ancient and more powerful version of the one Hermione used. This device might have been created by a powerful wizard in the past and Harry stumbles upon it in Hogwarts. It allows him to set the time and date he wants to travel to, which in this case is 1970.

Tom Riddle might be very suspicious at first. He is a very intelligent and cautious person. He would likely view time travelers as a threat to his plans or as a strange new phenomenon that he wants to control. So, he could start by trying to figure out their motives and how they managed to travel through time.

In such fanfiction, usually the character uses a time - turning device or some magical spell. They then travel back with the intention of revenge. For example, if it's Harry, he might go back to when Voldemort was still a student at Hogwarts to stop him before he becomes a dark wizard. He could use his knowledge of the future, like knowing about the Horcruxes, to defeat Voldemort early and get revenge for all the lives lost in the original timeline.

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.

In a fanfic, Tom Riddle could save Harry Potter because of some sort of time - travel or alternate reality scenario. Perhaps Riddle from a different timeline where he made different choices ends up in the main timeline and decides to save Harry. It could also be due to a prophecy that Riddle misinterprets. Instead of thinking Harry is a threat to his power, he thinks that by saving Harry, he will fulfill a greater destiny that will lead to him having ultimate power. This would be a very different take on Riddle's character and would require a lot of development in the fanfic.

The plot could center around Harry finding a mysterious spell that transports him to the 1940s. Once there, he discovers that the actions of a certain dark wizard in that era are linked to future threats he faced in his own time. So, he tries to stop this dark wizard's plans.

A possible plot is that a young wizard, who is a huge fan of Harry Potter stories in his own time, somehow gets transported back to Tom Riddle's era. He initially just wants to see the famous Hogwarts of that time. But then he crosses paths with Tom Riddle. He decides to use his knowledge of the future to try and befriend Riddle and change his path. However, he soon realizes that Riddle is far more complex and dangerous than he expected, and his actions start to have unforeseen consequences on the future.