Perhaps a group of radical wizards who believe that the apocalypse was a sign that the old ways of the wizarding world were wrong. They want to create a new order, even if it means using cruel and unethical magic. They see the more traditional wizards, like those who were friends with Harry Potter, as enemies who are holding back progress.
Maybe the apocalypse was caused by a dark magic experiment gone wrong. Now, Harry Potter's friends and family are scattered, and he has to journey across a desolate wizarding world to find them and also figure out how to reverse the damage. Along the way, he discovers new forms of magic that emerged as a result of the chaos.
Harry Potter himself is very common. After all, he's the main character in the original series and is likely to be at the center of any apocalyptic events in the fanfiction. Hermione Granger is also frequently seen as she's smart and resourceful, which are great traits in an apocalypse. Ron Weasley is another one, as he's Harry's loyal friend and has his own set of skills.
Well, in some 'Harry Potter Apocalypse Fanfiction', a really cool concept is the transformation of Hogwarts. It could become a fortress against the apocalyptic forces. The house rivalries might disappear as everyone focuses on survival. Also, the idea of magical creatures playing a different role, like the centaurs providing strategic advice or the hippogriffs being used for transportation in a more chaotic world.
One great post apocalyptic Harry Potter fanfiction is 'The Shattered World'. It presents a dark and desolate world after a magical cataclysm. The characters have to fight for survival in a way that's very different from the original series. Another one is 'Surviving the Ruins' which focuses on how the Hogwarts students band together against new and terrifying threats.
Maybe Harry Potter has to use his magic to fight against the apocalyptic disasters like hordes of dark creatures or a spreading deadly magic. He could gather his friends and allies from Hogwarts and the wizarding world to try and stop the end of the world.
Well, an apocalypse in Harry Potter fanfiction can change the magic system in multiple ways. Firstly, the availability of magical resources might change. For example, if there are no more potion ingredients growing in the wild, wizards have to find alternatives or create synthetic ones. Secondly, the way magic is taught and learned could be different. There might be a more urgent need for self - taught magic as Hogwarts could be in ruins. And finally, the very nature of some spells could be altered. Dark magic might become more prevalent and the boundaries between dark and light magic could become blurred as everyone is just trying to survive.
The professors at Hogwarts would also have different interactions. Dumbledore, if he were still alive, would be very diplomatic. He might try to understand the Horsemen's motives and see if there was a way to co - exist or send them back peaceably. Snape, on the other hand, would be more guarded. He might initially suspect the Horsemen of being part of some dark plot. The students at Hogwarts would be both scared and curious. Some of the braver ones might try to get closer to the Horsemen to study them, while others would stay far away. Overall, the interactions would be a mix of fear, curiosity, and attempts at understanding and control.
Maybe Neville could be a central figure. He has always been strong and determined. In a post - apocalyptic world, his skills in Herbology could be extremely valuable. He could be in charge of finding or creating new plants that can provide food, medicine, or protection against the new threats in the world.
One interesting concept could be the rebuilding of Hogwarts. After an apocalyptic event, the once - great school might be in ruins. The remaining wizards and witches could come together to restore it, using their magic in creative ways. They might have to find new sources of magical energy or deal with dark magic that has been unleashed during the apocalypse.