Well, it could be really cool. Harry might have Thor's strength and his connection to lightning. Maybe he could use his magic wand in a way similar to how Thor wields Mjolnir. For example, instead of just casting spells, he could channel Thor's power through the wand to create more powerful magical effects.
The plot would change a great deal. For one, Harry would be much more powerful physically. So when facing Voldemort, he could use Thor's strength in combat, not just rely on magic. He might be able to take on Death Eaters more easily.
It might involve Harry using his magical abilities in a sniper - like way. Maybe he uses his wand to aim precisely at enemies, much like a sniper aims a rifle.
In this fanfiction, Harry could be on a quest to protect dragons. Given his kind heart, he might learn about the cruel treatment of dragons in some parts of the wizarding world, like in dragon - breeding for the Triwizard Tournament. So he decides to take a stand and try to ensure their well - being. This could lead to him making new friends or enemies in the process, and exploring new parts of the wizarding world that are related to dragons.
It could entail a story about a Nundu being used in the Triwizard Tournament as an unexpected and extremely dangerous challenge. The champions would have to figure out a way to survive the encounter with the Nundu without using dark magic.
This fanfiction could involve a whole new set of relationships. Harry, as a mutant in this concept, might find himself befriending mutants from the X - Men universe. He could learn from them how to control his new - found mutant powers while also teaching them about magic. There could be a conflict between the wizarding world that wants to keep magic separate and the mutants who might see magic as just another form of power. Also, the story could explore how Harry's mutant nature affects his standing in the wizarding world, whether he is accepted or feared.
It might entail Harry having Kryptonian powers like super strength or flight while still being a wizard. He could use his magic in combination with his new powers to defeat villains in a more powerful way.
In 'harry potter is a demigod fanfiction', we could see a lot of changes to the existing story. For example, the magical world might have to interact with the world of the gods. There could be new enemies, like monsters from Greek or Roman mythology. Also, Harry's relationships with his friends and teachers might be different. His identity as a demigod could make him both more powerful and more of a target. He might have to go on quests like a typical demigod, which would be very different from his normal Hogwarts adventures.
In certain fanfiction, Harry Potter can be the reincarnation of Hades. Fanfiction authors often take creative liberties and blend different mythologies or concepts. They might be inspired by the idea that Harry has a connection to death (surviving Voldemort's killing curse as a baby) and Hades is the god of the underworld. So, they create a story where Harry is Hades reincarnated, perhaps with hidden powers or a different destiny related to the magical and mythological elements of both the Harry Potter series and Greek mythology.
One idea is that there's a new spell in the Harry Potter universe that involves lemons and unicorns. Harry Potter could be the first to discover it while interacting with a unicorn. Maybe it's a spell that can transform things into lemon - flavored magical treats for a short time, and the unicorn is the key to unlocking this spell.
In a Fem Harry Potter is Enkidu fanfiction, it might show Fem Harry Potter idolizing Enkidu. She could study the stories of Enkidu and try to incorporate some of his values into her life in Hogwarts. Since Enkidu was known for his strength and his relationship with Gilgamesh, Fem Harry Potter could perhaps form a similar strong bond with one of her friends, like Hermione or Ron, inspired by Enkidu's story.