Well, in some fanfictions, the Infinity Stones could be related to magic in the Harry Potter universe. Maybe they are like powerful magical artifacts that were lost in the wizarding world long ago. Also, the time - traveling aspect of 'Avengers Endgame' could be combined with time - turning spells in Harry Potter. This could lead to some really cool scenarios where characters from both universes have to work together to fix time - related problems.
One interesting crossover could be the use of magic in the Avengers' world. For example, Harry Potter characters could teach the Avengers spells to enhance their fighting abilities. Another aspect could be the character interactions. Imagine Hermione trying to figure out the science behind the Avengers' technology. Or Thor and Hagrid becoming friends over their love for large and powerful creatures.
One interesting crossover could be the use of magic in the Avengers world. For example, Hermione could use her knowledge of spells to help the Avengers solve a problem that technology couldn't. Maybe she could use a spell to break through an impenetrable force field created by an enemy. Another aspect could be the Avengers characters learning magic. Tony Stark might be fascinated by the concept of magic and try to incorporate it into his technology. Or Thor could share his knowledge of Asgardian magic with the Hogwarts students.
One interesting crossover could be the use of magic in the Avengers world. For example, Harry Potter characters could teach the Avengers some basic spells for self - defense or stealth. Another could be a plot where Voldemort teams up with a powerful Marvel villain, creating a huge threat that both the wizarding world and the Avengers have to face together.
One interesting crossover could be the Avengers visiting Hogwarts. Imagine Iron Man being fascinated by all the magic there and trying to figure out how to incorporate it into his tech. Another could be Harry Potter and his friends joining the Avengers on a mission. They could use their magic in unique ways to help the Avengers defeat a powerful enemy.
A great crossover would be Percy teaming up with Thor. Since Thor has his lightning powers and Percy has his demigod powers, they could combine their forces in a really cool way. Maybe Percy could use the water to conduct Thor's lightning, creating a powerful and unique attack. Also, Percy's knowledge of Greek mythology might give the Avengers some new insights into dealing with otherworldly threats.
A really cool crossover idea is that Thor's hammer, Mjolnir, could be enchanted by the magic of Hogwarts. The Avengers and the Harry Potter characters could compete in a tournament to see who can lift it. During this, they would learn about each other's values and powers. Harry could try to use his magic to move Mjolnir, and the Avengers could be amazed at the complexity of the magic in the wizarding world. This kind of interaction between the two universes makes for a really exciting fanfiction.
One interesting crossover could be the use of magic from Harry Potter in the battles of the Avengers. For example, Hermione's intelligence and knowledge of spells could help the Avengers come up with new strategies. Another aspect could be the idea of an immortal character from the Potterverse interacting with the Avengers. Maybe a powerful wizard or witch becomes an ally of the Avengers and uses their magic to enhance the team's capabilities.
The most interesting part is the crossover of different powers. For example, seeing Thor's lightning powers interact with Harry's magic spells is really cool.
One interesting crossover could be where the heroes from My Hero Academia are transported to the post - Snap world of Avengers Endgame. Deku, with his One For All power, could potentially help the Avengers in their fight against Thanos. He might use his speed and strength to take on some of Thanos' minions. Another idea is that the Infinity Stones could be used in the My Hero Academia universe, changing the power dynamics among the heroes and villains there.
One interesting crossover could be the use of magic in the Avengers' world. For example, Harry Potter characters could teach the Avengers some basic spells to help them in their battles. Another aspect could be the characters' personalities interacting. Hermione might befriend Bruce Banner and they could exchange knowledge about science and magic.
In a fanfiction, the Master of Death could be a sort of bridge between the two universes. The Avengers, with their superpowers, might be initially bewildered by magic. But with the help of Harry Potter and the power of the Master of Death, they could start to understand and use magic in unique ways. For example, Thor's hammer could be enchanted with new spells by the wizards. And the characters from Harry Potter could learn about teamwork from the Avengers.