Well, it could be a magical artifact. Maybe it's a special kind of wand or charm that glows underwater. In the wizarding world of Harry Potter, there are so many unique magical items. It could also be related to a spell. For example, a spell created by a character to explore underwater areas. This underwater light might play a crucial role in a hidden underwater adventure. It could lead the characters to discover a long - lost secret, like an ancient wizarding site or a hidden treasure guarded by magical creatures.
Perhaps it's a side - effect of some dark magic. A wizard or witch who has dabbled in dark arts might have accidentally created this underwater light while performing a powerful spell. In the fanfic, this could lead to a mystery that the main characters have to solve. They might have to figure out how to stop the spread of this strange light if it's causing harm to the underwater ecosystem in the wizarding world, which could include magical plants and animals.
It can be used for exploration. Characters could use the underwater light to find their way through underwater caves or ruins in the wizarding world. For example, Harry and his friends might be on a quest to find a hidden Horcrux underwater, and the light would help them see in the dark depths.
It could mean a story related to Harry Potter but not in the style of a typical fanfic for the Potter series. Maybe it's a story that takes a different view on Harry Potter, like a critical analysis or a parody that doesn't follow the fan - created norms.
The fanfic could center around Harry's life outside of the main events of the books. For example, it could explore his summer holidays in more detail. He could be spending time in the Muggle world and using his magic in creative ways to solve normal, everyday problems. He might use magic to help his neighbor fix a broken fence without the neighbor realizing it was magic. This would add a new dimension to his character and show how he can adapt his magical abilities to different situations.
It could be about how the wizarding world responds to the muggle tragedy. Maybe they send help secretly or use magic to prevent similar disasters in the future.
It might imply a fan - created alternate universe where the story of Harry Potter is told through the lens of Vocaloid. For example, the spells could be like Vocaloid songs, and the characters' voices could be thought of as synthesized like Vocaloid voices. It's a really out - there and unique idea that combines two very different things in an unexpected way.
One possible plot could be that Harry Potter is hired by Sherlock Holmes to help with a case that involves dark magic. Harry uses his knowledge of the wizarding world to uncover clues that Sherlock couldn't find with just his deductive skills.
Imagine Harry Potter as a bartender. He could be using his skills not just in mixing drinks but also in reading people. Since he has faced so many challenges in his life, he can easily spot if a customer is hiding something or if they are in trouble. His bar could become a place where secrets are shared, and he has to use his wits and magic to keep things in order. He might also have to deal with rival bartenders from other wizarding establishments who are jealous of his popularity and unique drinks.
Well, in a 'Harry Potter is Jellal' fanfic, it might start with a strange magical accident that transports Jellal into the Harry Potter universe. Since Jellal is often portrayed as a complex and powerful character, he could have a significant impact on the events in the wizarding world. He might get involved in the fight against Voldemort, using his own combat skills and magic. At the same time, he would have to deal with the cultural shock of a new world, like the differences in magical creatures, the social hierarchy at Hogwarts, and the way magic is taught. This could lead to a lot of humorous and exciting situations as he tries to fit in while also being his own unique self.
The plot could involve Harry Potter discovering he has some sort of connection to a dragoness. Maybe he can communicate with her telepathically. They could team up to fight against dark forces in the wizarding world. For example, Voldemort might be after the dragoness for her powerful magic, and Harry has to protect her while also using her strength to defeat Voldemort.
In fanfic, tattoos can have magical properties. A tattoo of a magical object, say the Elder Wand, might give the wearer some power related to the object. It could also be a form of protection. If a character has a tattoo of a powerful charm, it might protect them from certain dark magic. Moreover, tattoos can be used to tell a character's backstory. A character with a tattoo of a certain place in the wizarding world might have had an important experience there.