Time travel can give the DADA teacher a chance to change things. They could try to prevent certain dark events from happening in the past. But this also comes with risks. If they change too much, they might disrupt the entire timeline. In some fanfics, the teacher has to be really careful about what they do and say to not cause chaos in the wizarding world's history.
One great fanfiction in this genre is 'The Time - Twisted DADA Teacher'. It has an interesting plot where the DADA teacher from a future time travels back to Hogwarts during Harry's time. The character development is well - done and it weaves in elements from the original series in a creative way.
It can make the storyline more complex and full of possibilities. When Harry time - travels, he might accidentally create a time paradox. This means that his actions in the past could have unforeseen consequences in the present. For instance, if he saves someone who was supposed to die, it could change the entire course of the war against Voldemort. Sometimes, time travel allows for characters to gain new powers or knowledge from the past, which they then use to change the future for the better or worse.
Time travel can completely reshape the canon storyline. For instance, if Harry goes back and saves Sirius, it changes the emotional state of Harry in later years. He would have a strong mentor figure by his side, which could lead to him being more confident and making different decisions. Also, if he stops Voldemort's Horcrux creation, the entire battle against Voldemort would be very different. There might not be a need for a long - drawn - out war, and many lives could be saved.
In some fanfics, time travel can strengthen their relationship. For example, if they travel back in time and face difficult situations together, they rely on each other more. This shared experience can make their bond deeper.
Well, if Harry travels back in time, it might strengthen his relationship with Cedric. For example, he could warn Cedric about the danger in the maze earlier, and Cedric would be more trusting of Harry. This would create a deeper bond between them as they work together to face the challenges.
A great fanfic idea could be that the DADA teacher is actually an animagus who uses their animal form to secretly spy on the Death Eaters. They could be a cat or a bird, for example. In the fanfic, Harry and his friends might start to suspect something strange about the teacher when they notice the animal always seems to be around when important information is being passed. Eventually, they discover the truth and the teacher becomes an even more important ally in their fight against the dark forces.
Another challenge for Harry as Dada teacher could be dealing with the school's bureaucracy. He might want to introduce new teaching methods or change the curriculum, but he has to go through the proper channels. And there could be resistance from some of the more conservative teachers or the school administration who are used to the old ways of teaching Dada.
Well, in this fanfiction, Harry might use his own experiences with dark magic to teach in a very practical way. For example, he could share how he faced Voldemort and his Death Eaters and turn those real - life situations into lessons on defensive magic. He might also introduce some new spells that he has learned or developed during his adventures.
One great fanfiction could be where the new Dada teacher is secretly a time - traveling wizard from a future Hogwarts. He uses his knowledge of future dark magic threats to prepare the students in a really unique way.
Maybe the new Dada teacher was once a student who was deeply affected by a dark magic encounter. So, he came back to teach DADA to make sure no other students have to go through what he did.