One example could be that the positive battery is used to power a portal. In the fanfic, this portal allows the Avengers to travel to the wizarding world of Harry Potter. It's a positive battery because it's a source of energy that enables a positive connection between the two universes, leading to new adventures and the ability to fight common threats together.
In a more literal sense, if we think about a positive battery in a fanfic, it could be a new invention. Maybe a wizard in the Harry Potter world teams up with Tony Stark. They create a positive battery that uses both magic and technology. This battery could power a device that can nullify dark magic and the weapons of villains from both universes.
In some fanfics, Ginny Weasley shows great courage and cunning. For instance, she might have the courage to explore the Forbidden Forest on her own for a particular quest. And her cunning is shown when she uses her knowledge of the forest's creatures and magic to her advantage. She could set up clever traps or distractions to avoid dangerous creatures while still making progress towards her goal. This kind of portrayal of Ginny in fanfic not only gives her more agency but also shows how the themes of courage and cunning can be applied to different characters in the Harry Potter universe.
In some fanfics, the unexpected might be that Harry Potter himself loses his magic for a while. This turns the whole dynamic upside down as he has to rely on his friends and non - magical skills. It's a new take on his character and creates a lot of room for different plot developments. Also, there could be a fanfic where the Weasley twins' pranks go horribly wrong in an unexpected way, like accidentally releasing a dangerous magical creature within Hogwarts.
First, you need to understand the characters well. Know their personalities, powers, and goals. For example, Thor is a powerful Asgardian with his hammer (or axe in Endgame), and Harry Potter is a young wizard with a strong sense of justice. Then, think of a plot that can bring these two universes together. It could be a crossover of villains, like Loki and Voldemort teaming up.
Well, he could bring his magic skills to the team. Maybe he could use spells to enhance the Avengers' weapons or defenses. For example, he could put a protection charm on Iron Man's suit to make it even more resistant to attacks.
Another theme is the teamwork aspect. Both Harry Potter and the Avengers rely on teamwork. Fanfics often explore how the characters from the two universes would work together, like Hermione and Bruce Banner collaborating on some scientific - magical research.
In the world of fanfic, it's a complex matter. From one perspective, using Crucio goes against Harry Potter's moral code in the original series. He is a hero who stands against the Dark Arts. However, in fanfic, authors might explore 'what - if' scenarios. But still, it's not an ethical act as Crucio is an unforgivable curse that causes extreme pain.
I'm not sure specifically which ones are the best, but you could search on fanfic platforms. Some might feature a mute Harry himself, having to find new ways to communicate with his friends and face the challenges at Hogwarts without using his voice.
One example could be fanfics where Harry is tortured by dark wizards in a way that explores his inner strength and how he copes. Another might be those where he endures mental torture due to false accusations within Hogwarts. However, these can be quite dark and disturbing.
Well, in some cruel Harry Potter fanfic, they might rewrite the story so that the Dursleys are far more abusive than in the original. Harry could be locked away, starved, and made to suffer in ways that are really difficult to read. Another type could be fanfics where the wizarding world turns against Harry unjustly, perhaps because of false accusations, and he has to endure great hardships all alone.