Another idea is that the Infinity War spills over into the wizarding world. The Avengers come to Hogwarts seeking help. Harry and his friends teach the Avengers about magic, and together they fight against Voldemort and Thanos. For example, Hermione could use her knowledge of spells to create magical barriers around the Infinity Stones while the Avengers use their combat skills to fend off the Death Eaters.
Well, it could be that Voldemort teams up with Thanos somehow. Maybe Voldemort is attracted by the power of the Infinity Stones. He could use the Time Stone to go back and change some key events in the wizarding world to his advantage, like preventing Harry's parents from being protected by the Fidelius Charm.
In this type of fanfic, the Infinity Stones could have a very different effect in the Harry Potter universe. For example, the Time Stone could be used to reverse dark spells or resurrect fallen wizards. However, the Stones' power might also be limited by the magic rules of the wizarding world. The fanfic could delve into how the characters from both universes adapt to the presence of the Stones and how they use or misuse their power.
Well, Harry Potter could use his magic skills. For example, he could use the Patronus charm to fend off some of the alien creatures in Infinity War. His knowledge of spells like Expelliarmus could also be used to disarm the villains' weapons.
One way is through his magical transportation methods. The Floo Network or Apparition could be used to quickly move the Avengers around. Harry could also use his wand to perform healing magic on the injured heroes.
Hermione Granger would also be a crucial character. Her intelligence and vast knowledge of magic could be key in understanding the powers of the Infinity Stones and coming up with strategies to deal with them. She could also be the one to communicate with the Avengers if they come to Hogwarts, as she is good at dealing with new and complex situations.
Yes, there are likely some fanfics out there with this concept. The 'Harry Potter' universe and the idea of the Infinity Stones from the Marvel universe are both very popular, so some creative fans might combine them in their fan - created stories.
One way could be through a powerful dark wizard's experiment. Maybe a wizard, seeking ultimate power, discovers a way to bring the Infinity Stones into the magical world. They could be hidden as powerful magical artifacts, and their powers might be harnessed in a way similar to how wizards use magic. For example, the Time Stone could be used to manipulate time within the wizarding world, perhaps to reverse a tragic event or to gain an advantage in a battle.
The characters from Harry Potter could bring their unique magical abilities. For instance, Harry could use his invisibility cloak to sneak up on Thanos. Ron could use his chess - playing skills to strategize against Thanos' forces. And the magical creatures from the Harry Potter world, like Hippogriffs, could be used for transportation or as an added force in battles.
One interesting plot could be that the Infinity Stones are the key to defeating Voldemort once and for all. Harry discovers that the Stones have the power to not only destroy Voldemort but also to repair the damage he has done to the wizarding world. However, the Ministry of Magic wants to use the Stones for their own gain and power. So Harry has to fight against the Ministry as well as Voldemort to get the Stones and use them for good.
Perhaps he leaves to explore the Muggle world. Harry has always had an interest in Muggles. After the war, he realizes he wants to experience life without magic for a while. He could go to university in a big city like London, study a Muggle subject like history or literature. He'd make new Muggle friends and try to fit in, all while still having his magical abilities hidden, which would add an interesting dynamic to his new life.
One possible fanfic could be about a wizard from the Harry Potter world accidentally stumbling into the Marvel universe. The wizard discovers the Infinity Stones and realizes their immense power. He teams up with the Avengers to protect the Stones from a dark wizard who wants to use them to conquer both universes. The story could involve the wizard using his magic in unique ways to help the Avengers in battles and the Avengers teaching the wizard about their world.