Well, one possibility could be that it was an accident. Maybe Hermione was in a rush during a spell - casting practice session and accidentally knocked Harry's wand out of his hand and it broke on a hard surface. Another could be that she was under the influence of some dark magic or a spell that made her lose control and break it in a fit of rage or confusion.
Harry might be initially shocked and angry. After all, his wand is an important part of his identity as a wizard. He could lash out at Hermione immediately, demanding an explanation for her actions.
In the 'Harry breaks his wand fanfic', perhaps Harry will struggle a great deal. Without his wand, he might have to rely on his non - magical skills and knowledge more. He could be in a very dangerous situation in the wizarding world where magic is often a means of defense and problem - solving.
One possible reason could be their different career paths. Harry might be more focused on Auror work which is dangerous, and Hermione, being the practical person she is, may not want to live in constant fear for his safety. Another reason could be a growing apart in their values. Maybe as they get older, Hermione realizes that Harry has a more impulsive nature when it comes to making decisions regarding the wizarding world's politics, while she prefers a more calculated approach.
In the fanfiction, Merlin might use his ancient and powerful magic to source rare materials for Harry's wand. He could search for a special type of wood, perhaps from a magically protected tree. And for the core, he might look for a unique magical essence like the hair of a mythical creature. He would then combine these elements with his incantations and spells to shape the wand into a perfect tool for Harry.
There's also 'Fractured Bonds' which is quite interesting. In this fanfiction, the break - up is caused by a misunderstanding that gets blown out of proportion. It shows how pride and miscommunication can lead to the end of a relationship. Hermione is heartbroken and Harry realizes his mistake too late. It's a really engaging read if you like exploring complex relationship dynamics.
Often, the plot of 'Harry breaks his wand fanfic' starts with the accident or incident that breaks the wand. Then, Harry has to face immediate challenges like not being able to perform basic spells for protection or daily tasks. He may then set out on a journey to either repair the wand or find a replacement in an unorthodox way.
She might use her sheer intelligence and knowledge of magic. Hermione is known for her studious nature. So, perhaps she discovers ancient incantations that can be cast without a wand, relying on precise pronunciation and intense concentration.
In fanfiction, Harry with a different wand can lead to all sorts of interesting scenarios. Maybe the wand has different magical properties that he has to learn to control. For example, it could be more powerful in certain types of magic but less so in others. This would force Harry to adapt his magical techniques.
There's a chance that the maker is a new character, an old hermit wizard who lives deep in the Forbidden Forest. He has been observing Harry from afar and realizes that the wands available in the regular market are not sufficient for him. So, he uses his knowledge of forgotten magics to craft a custom wand just for Harry.