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.
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.
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 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.
The plot might involve Harry accidentally stumbling upon the Infinity Gauntlet in the Room of Requirement. As he tries to figure out what it is, he discovers its immense power. However, the Ministry of Magic wants to use it for their own gain. Harry has to decide whether to keep it safe from the Ministry or use it himself to finally defeat all the dark forces that still lurk in the wizarding world.
One possible plot could be that the Infinity Stones are hidden in Royal Woods. Thanos sends his forces to find them. The Loud family discovers what's going on and decides to protect their town and the world. Each member of the family could be assigned to protect a different area, and they'd have to use their individual quirks and abilities to fend off the invaders. They might also team up with some of the Avengers who come to Royal Woods for help.
The plot could involve the Justice League facing off against Thanos. Maybe Superman tries to take on Thanos one - on - one at first, but realizes he needs the whole team. Batman could be strategizing on how to get the Infinity Stones away from Thanos. Wonder Woman could be leading the charge in the battle scenes, using her strength and skills. And Flash could be using his speed to either steal the stones or disrupt Thanos' attacks.
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.
It could be a wild and exciting mix. Imagine Harry Potter and his friends suddenly in the Marvel universe during Infinity War. Harry could use his magic against Thanos. Maybe Hermione would figure out a way to counter the Infinity Stones' power with her vast knowledge. Wizards and superheroes teaming up would make for some really cool battle scenes and unexpected alliances.