Well, in this kind of fanfiction, the plot might start with some strange occurrences in the wizarding world that are linked to shadow demons. Harry could be the one who starts to notice these things first. As he investigates, he realizes that he has a special bond with a shadow demon. This bond could give him new powers or a different perspective on magic. However, he would also have to deal with the prejudice and fear of others in the wizarding community who see the shadow demon as an evil force. The story could then revolve around Harry trying to prove that the shadow demon within him can be used for good, all while still trying to defeat the dark wizards like Voldemort.
Perhaps Harry discovers he has some connection to a shadow demon. Maybe it's a hidden part of his magic that he has to explore while still dealing with the challenges at Hogwarts, like fighting Voldemort. The shadow demon aspect could add a new level of darkness and mystery to his character and the overall story.
The plot could involve Harry being a reincarnation of Anubis. He might start to have strange dreams and visions related to his past life as the Egyptian god. As he tries to understand these, he discovers that his powers as Anubis are starting to surface. This could lead to him having to protect the wizarding world from a new kind of threat that only his combined powers can defeat.
Maybe Gandalf appears in the wizarding world of Harry Potter and helps him to defeat Voldemort. He could use his powerful magic that is different from what they have in Hogwarts.
Maybe Harry Potter and his friends have to follow Colonello's orders for some mission in the wizarding world.
One possible plot could be that Harry is revealed to be a Dragon Lord through a mysterious prophecy. As a result, he has to leave Hogwarts for a while to learn about his new role among the dragons. He then returns with dragon - like powers and knowledge, and uses this to fight against Voldemort in a very different way than in the original series. For example, he could summon dragons to battle the Death Eaters.
Well, perhaps the main character is a transfer student who has a background in sword - fighting from the Muggle world. In the wizarding world of Harry Potter, they find that their skills can be enhanced with magic. They start to train under a mysterious figure who teaches them how to combine their Muggle sword - fighting with wizarding magic. This makes them a formidable 'master swordsman' and they use their skills to protect the wizarding world from a new threat that normal magic can't handle. As they progress, they also face challenges from those who are jealous of their unique abilities or those who fear the combination of Muggle and wizarding fighting styles.
It could be about Harry experiencing 12 different lifetimes, each with its own set of challenges and adventures. Maybe in one life he's a powerful dark wizard, in another a humble healer, and so on.
Well, it could be about Harry struggling to fit in with the typically bold Gryffindors. Maybe he has a hard time speaking up in class or during Quidditch matches. He might have a small group of close friends who help him come out of his shell.
In this fanfiction, perhaps the Japanese god has a prophecy about Harry. The plot might be that Harry is transported to a realm where Japanese mythology and magic coexist. There, he has to prove himself worthy of the god's power. He could learn new forms of magic, make new friends from the Japanese mythological creatures, and at the same time, figure out how to use this new power to protect his own world. For instance, he might have to face a dark wizard who has also tapped into some of the power of the Japanese mythological world, and Harry's newfound connection to the god gives him an edge in the battle.
Perhaps the plot could involve the Hogwarts houses competing like 'Big Brother' contestants. Each house has to strategize, form alliances, and complete tasks to avoid being 'evicted'. Harry could be a key player in Gryffindor's strategy.
One possible plot could be that Harry discovers a hidden connection between his wizarding world and the world of vampires. Dracula, for some reason, sees potential in Harry and decides to make him his'mate', which could mean an apprentice or a partner in some dark magic deeds. Harry, initially reluctant, gets drawn into Dracula's world as he realizes there are secrets about his own magic that Dracula can help him uncover.