One possible plot twist could be that Snape is secretly protecting Harry not just because of his connection to Lily, but because he discovers a new prophecy related to Harry that could change the fate of the wizarding world. So, he takes Harry in to keep a closer eye on him and train him in a way Dumbledore couldn't.
One possible plot twist could be that Snape reveals a long - hidden Christmas tradition in the wizarding world that is related to Harry's family. Maybe it has something to do with his mother Lily. For example, Snape could show Harry a charm that Lily used to create a special Christmas decoration every year, and this charm has been passed down in the Potter family. Another twist could be that Snape and Harry get stuck in a magically - created Christmas - themed maze during the holidays, and they have to work together to get out. This would force them to set aside their differences and understand each other better.
One possible plot twist could be that they discover a hidden chamber in Potter Manor. This chamber might hold secrets about Harry's family that no one knew before. It could be filled with old magic items or books that give them new powers or knowledge.
It could be that the living werewolf hide is a sentient being in a way. It can communicate with Harry, but only in a very cryptic manner. Harry then has to decipher these messages to figure out what the hide wants from him. It might lead him on a journey to find an ancient werewolf artifact that could either save or destroy the wizarding world.
One possible plot twist could be that the creature aspect gives them unique abilities to protect their unborn child. For example, if it's a magical creature gene involved, they might be able to create a powerful protective charm around the baby that no dark wizard can penetrate. Another twist could be that the Mpreg is part of a prophecy that neither of them knew about. It could lead to a situation where they have to make difficult choices to fulfill the prophecy and save the wizarding world.
One main plot twist could be the revelation of Snape's true relationship to Harry. This would completely change Harry's view of himself and Snape. Another could be how the wizarding world reacts to this news. People who once hated Snape might have to reevaluate their opinions, and those who thought they knew Harry's family history would be shocked.
The plot could take a really interesting turn when it comes to Voldemort. Since Snape is raising Harry, he might train Harry in a way that Voldemort doesn't expect. Maybe Harry would be more of a spy in the dark side's camp. Snape could also use his position to mislead Voldemort about Harry's true abilities and intentions. This would create a whole new set of challenges and power dynamics in the fight against the Dark Lord. Harry's loyalties would be constantly tested, and his relationship with Snape would be even more crucial to the story.
A really cool plot twist might be that Snape has a secret magical bond with baby Harry. This bond was formed when he saved Harry and it gives Snape the ability to sense Harry's emotions and even transfer some of his own magical power to Harry when he's in danger. It adds a whole new layer to their relationship and Snape's role as Harry's protector.
One possible plot twist could be that the lich, despite being a dark and undead being, has a soft spot for Harry and teaches him unique forms of magic that are not part of the regular Hogwarts curriculum. This could put Harry in a strange position among his peers as he has knowledge that is both powerful and a bit unorthodox.
Well, it could be that Snape is wrongly accused of a great crime in this fanfic, and in the heat of the moment, someone attempts to kill him. Maybe it's a misdirected act of revenge by someone who thinks Snape is behind a series of dark events at Hogwarts. But of course, the truth might be far more complex and intertwined with the overall politics and secrets of the wizarding world.
Perhaps Snape and Hermione were secretly working on a time - traveling potion project. Due to some unforeseen consequences of time manipulation, Hermione ended up pregnant. It could also be that a powerful magical artifact they were studying had some sort of fertility - enhancing effect that they didn't anticipate at first.