One way is through a magical tournament. The Triwizard Tournament could be modified to include Warhammer - related tasks. For example, instead of facing a dragon, the contestants might have to battle a Warhammer - style daemon.
Perhaps there is an invasion of Warhammer - inspired creatures into the wizarding world. This would create a huge challenge for the Harry Potter characters. They would have to use their magic in new and creative ways to fend off these strange and often very dangerous invaders. It would also bring in the unique aesthetics and themes of Warhammer, like a sense of a more brutal and unforgiving conflict, into the relatively more 'tame' (compared to Warhammer) world of Harry Potter.
Well, it could be a crossover where the dark and gritty elements of Warhammer are introduced into the magical world of Harry Potter. Maybe it's a challenge for the Hogwarts students to face Warhammer - like foes or situations.
Nanomachines could be introduced as a foreign element from a different dimension. In the fanfic, they might be accidentally brought into the magical worlds of LotR and Harry Potter. For instance, a wizard in the Harry Potter world experiments with a new spell that creates a portal, and through this portal, nanomachines from a high - tech future world enter. In LotR, they could start affecting the ents, making them act in strange ways. The characters would then have to figure out how to deal with this new threat.
A squib swordsman could fit into the Harry Potter fanfic universe by being a unique kind of hero. They could start out as a character who is mocked by wizards for being a squib. However, when danger comes, their swordsmanship becomes crucial. For instance, if there is a dark magic - based threat that nullifies wands, the squib swordsman can step in and save the day. They could also be a link between the wizarding world and the non - magical world, using their skills from both sides to solve problems.
She could be a new transfer student with superpowers at Hogwarts who discovers she's pregnant. The professors and students would have to adjust to her powers and her situation, and she might have to deal with the prejudiced views of some in the wizarding world.
Alucard could fit as a powerful outsider. His vampiric abilities like super strength, speed, and the ability to turn into mist or a bat would be very different from normal wizard magic. He could be a sort of anti - hero, helping Harry when it suits his own goals. For example, if there was a dark wizard using blood magic in a way that threatened Alucard's existence too.
In a fanfic, Harry Potter could enter the Avengers' story through a magical portal. Once there, he could use his magic to complement the Avengers' skills. For example, his ability to communicate with snakes could be useful if they encounter snake - like villains. His experience with horcruxes might also give him insights into dealing with powerful and hard - to - destroy enemies in the Avengers' world. His wand could be a unique weapon in their battles, and his ability to perform complex spells could turn the tide in difficult situations.
Gwendy can fit in as a new friend to the main characters. She could join Harry, Ron and Hermione on their adventures and offer a fresh perspective. Maybe she has a different approach to solving problems, like using her knowledge of Muggle technology in a magical way.
Pikachu could be a special guest at Hogwarts. It might be brought there by a powerful wizard who has traveled to other dimensions. And it could use its electric attacks to protect the school from dark forces.
Dragons in 'Harry Potter' fanfics often serve as powerful and mysterious elements. They can be used as a plot device to introduce danger or adventure. For example, a dragon might be guarding a hidden treasure or a powerful magical object. In some fanfics, characters might form bonds with dragons, like in the books where Hagrid has an affinity for dangerous magical creatures.
A Wendigo could be a dark and mysterious addition. It could be part of a new threat that emerges from the Forbidden Forest. The magical creatures in the forest might be afraid of it, and it could start preying on students who wander too far. Harry and his friends would need to use spells like the Patronus to protect themselves.