Well, he might use his magic in the Marvel universe in really interesting ways. Maybe he'd team up with Doctor Strange and they'd exchange knowledge about different kinds of magic. He could also use his quick - thinking and combat skills learned from fighting Voldemort to face Marvel villains.
If Harry Potter was in the Marvel Universe, he'd probably end up at Xavier's School for Gifted Youngsters. Think about it, a school full of mutants with special powers, and here comes Harry with his wizardry. He'd either be a great asset or cause a bit of a stir. His magical abilities would be a new kind of power that the X - Men and other mutants might not be used to dealing with.
Well, he might bring his magic skills into the Naruto world. Maybe he could use spells to enhance his ninja techniques. For example, he could use a spell to make his shuriken fly faster or more accurately.
Well, he might use his magic in ways that would shock the shinobi world. Maybe he could combine spells with ninjutsu to create some really powerful attacks.
Well, they might use their genius to master magic faster than others. For example, they could quickly figure out complex spells and potions that usually take years to learn. They might also come up with new magical theories or inventions, like a more efficient way to travel using magic.
Well, he might bring his demigod skills to Hogwarts. He could be really good at Defense Against the Dark Arts, using his combat experience from fighting monsters. And his ability to adapt quickly, which he had in the Percy Jackson world, would help him in the wizarding world too.
Well, he might bring his ninja skills to Hogwarts. He could use his chakra control to perform amazing feats in magic classes, like enhancing his spellcasting speed. Also, his determination would make him a great Gryffindor. He'd probably befriend Harry and the gang, and teach them some ninja moves for self - defense against the Dark Arts.
Well, he might bring his magical skills into the world of vampires and werewolves. Maybe he'd use magic to deal with the complex relationships between the Cullens and the werewolf pack. He could also introduce new magical elements to the Twilight world, like potions to counteract vampire venom or spells to protect humans from vampire attacks.
If Harry Potter was reborn in the Game of Thrones universe, it would be a total game - changer. His magic skills would make him a target for some who fear the unknown and a valuable ally for others. He might try to teach some of the people in Westeros about magic, which could either be seen as a great boon or a heresy. And he would surely have his own moral code that would clash with the cut - throat nature of the Game of Thrones world, leading to many interesting storylines.
In fanfiction, Harry as the Master of Death could also start a new school of magic in the Marvel universe. This could attract both mutants and regular humans with an aptitude for magic. It would be a place where they could learn about the different aspects of magic, especially those related to life and death. This would not only expand the magical community in the Marvel universe but also create a new generation of heroes and magic - users who have a different understanding of death and its implications.
Well, he could use his magic to help the Avengers in battles. Maybe he could use a spell to disarm Thanos of the Infinity Stones. His broomstick flying skills would also be useful for quick getaways or aerial attacks.