Well, it could be that there was a personal vendetta against Harry at the Quidditch World Cup. Some wizard or witch who had a grudge against him might have started something, and Harry had to fight back. He is known for not backing down when faced with a threat. Also, if there was a plot to steal the Quidditch World Cup trophy, Harry would fight to prevent that from happening as he values fairness and the importance of the sport.
Another plot could revolve around a conspiracy to fix the Quidditch World Cup results. A group of dark wizards might try to influence the outcome for their own gain, like betting on a certain team to lose. A young wizard or witch who discovers this plot then has to find a way to expose it and save the integrity of the tournament.
In a possible fanfiction, Harry could be at the Quidditch World Cup and say something like 'The floor here is so dusty, it's a wonder we can even see the players clearly!' while looking around the stadium floor.
A fanfiction involving Hermione and Death Eaters could focus on a moral dilemma. For example, if Hermione has the chance to save a Death Eater's life, would she do it? This could explore her character's sense of right and wrong. It could also be about how she endures the psychological torture that the Death Eaters might inflict on her, showing her strength and resilience.
Well, in some fanfictions, Hermione might use her superior intellect. She could outwit the Death Eaters by setting up elaborate magical traps. For example, she could use transfiguration magic to create objects that suddenly turn into something dangerous when the Death Eaters approach. Another way could be through her extensive knowledge of potions. She might create a potion that incapacitates or kills them when they come into contact with it.
Perhaps in the fanfiction, Hermione has something that the Death Eaters are after, like a powerful magical artifact. They fight over who gets to take her prisoner first in order to extract the location of this artifact from her. It could also be that they are under the orders of Voldemort to capture her alive, but they start fighting among themselves due to personal rivalries and the desire for glory within the Death Eater ranks.
Obviously, some well - known Death Eaters like Bellatrix Lestrange would be likely main characters. Bellatrix is extremely cruel and power - hungry, so she would be eager to get her hands on Hermione. Lucius Malfoy could also be there. He is always looking for ways to gain more influence in the dark wizarding world, and Hermione might be a means to that end for him.
Harry was at the Quidditch World Cup. As he walked through the crowded stadium, he looked down at the floor and muttered, 'This floor has seen so many fans over the years. It must have some great stories to tell.'
A young and talented Seeker from a far - off wizarding school. This character could be really fast and have an almost sixth - sense when it comes to finding the Snitch. They could come from a school that has a very different approach to Quidditch training, like they train in the middle of a thunderstorm to improve their reflexes.
Character depth. In a mature fanfic, the characters should be more than just players on the pitch. They should have complex backstories, motives, and relationships. For example, a character might be playing in the Quidditch World Cup not just for glory but to overcome a personal tragedy.