One interesting idea could be a wand core made from the essence of a defeated dementor. This core might give the wand the power to manipulate emotions on a large scale, similar to how dementors affect people. But it could also be used for good, like helping people overcome their worst fears by making them face them in a controlled way.
In a fanfic, there could be a story where a wizard discovers that his or her wand core has a hidden connection to dementors. This connection could be revealed when the wizard is in a life - threatening situation near dementors. The wizard then has to learn to control this connection and use it to their advantage, perhaps by using the power of the dementors in a way that is not evil, like using the coldness of the dementors to freeze an enemy's dark magic.
In many Harry Potter fanfics, the concept of dementors often adds a dark and mysterious element. When it comes to wand cores, there could be a fanfic where a character discovers a new type of wand core that has been affected by dementor magic. This could lead to a whole new set of spells and abilities for the wizard or witch who wields it. The wand might have an affinity for dark arts - like spells, but also might be able to counteract the effects of dementors on a person's soul, creating a very complex and morally ambiguous magical item.
There are many wand cores in Harry Potter fanfic. One interesting core that might be used is the scale of a mermaid. This could potentially give a wand some water - related magic abilities. Also, the fang of a werewolf could be a core, which might make the wand more attuned to lunar magic or have a wilder, more uncontrollable aspect to its magic. The idea of different wand cores in fanfic allows for a lot of creativity and exploration of new magical concepts.
One idea could be a story where a character has a special power to resist Dementors' effects more than others. Maybe they discover a hidden spell or have a unique magical ability that they use to fight off Dementors when others are in danger. For example, a young witch or wizard who can emit a positive energy that counteracts the Dementors' despair.
One interesting 'Harry Potter Elder Wand' fanfic could be one where the Elder Wand has a sentience of its own and it tries to guide the wizard who wields it towards a different destiny than what is expected in the original series. It might lead the wizard to uncover secrets about the wand's true origin that were long forgotten.
One interesting 'Harry Potter Broken Wand' fanfic could be one where Harry has to find a way to repair his broken wand in a world where magic for wand - repair has been lost. He might go on a journey to discover ancient spells or seek help from long - forgotten magical creatures.
Well, a cool plot might be that some students at Hogwarts start to develop a resistance to the Dementors' effects due to a new magical potion they accidentally create. Harry could be involved in helping them perfect this potion. Also, a story where Dementors are used as a weapon in a wizarding war but then start to turn on their masters. Or maybe Harry has a vision of his parents being attacked by Dementors and he has to go back in time to try and save them.
In the world of Harry Potter fanfiction, wand cores can be quite creative. One type that might show up is the hair of a hippogriff. Hippogriffs are proud and noble creatures, so a wand with their hair as a core could have a certain grace and strength. There are also those that might use the scales of a mermaid. This could give the wand a connection to water magic, perhaps having special abilities when it comes to spells related to water or the sea.
One idea could be to write about a wand that has a mind of its own and causes chaos for its owner. For example, it might cast spells at inappropriate times or choose to work only for certain types of magic that the owner isn't familiar with.
One possible fanfic could be where Harry Potter absorbs the power of an ancient wand, and as a result, he gains new and unexpected magical abilities. This might change his relationship with his friends and enemies in the wizarding world.
Another interesting aspect could be the origin of such wands. Maybe they are created by a very powerful and ancient wizard who was experimenting with combining different magical essences. This could lead to a whole new set of wandlore and traditions within the fanfiction world.