Well, a Thestral Patronus in fanfiction might be a symbol of the character's ability to face their fears. Since Thestrals are invisible to those who haven't witnessed death, a character with a Thestral Patronus could have a special understanding of mortality. It could be used in the fanfic to show that the character has a complex personality. They are not just the typical 'good' or 'bad' but have a depth that comes from experiencing something as profound as death. This kind of Patronus could also be a way for the author to explore themes of grief and acceptance in the story.
A storyline might involve a character who discovers their Thestral Patronus during a time of great personal loss. They then embark on a journey to understand the significance of it. Along the way, they meet other characters with unique Patronuses and together they form a sort of 'Patronus alliance' to fight against a new threat in the wizarding world that is related to the darker aspects of magic which the Thestral Patronus represents.
Yes, there are quite a few. You can find them on fanfiction websites like FanFiction.net or Archive of Our Own. Some may explore the idea of a character becoming an Animagus with the form of a Thestral, which could bring unique storylines involving the connection to death and the magical abilities of Thestrals.
I've read a fanfic where the main character has a fox patronus and they use it to explore the Forbidden Forest. It was really exciting as they discovered new magical creatures with the help of their patronus's senses.
In some Harry Potter fanfictions with a fox patronus, the author might explore the symbolism of the fox. The fox is often seen as clever and sly in muggle folklore, so perhaps in the fanfic, the character with the fox patronus uses these traits to outwit dark wizards or solve mysteries within Hogwarts. For example, they could use their fox - like cleverness to figure out the secrets of the Chamber of Secrets in a new and different way than what was shown in the original books.
A pegasus Patronus is also a great concept in fanfiction. Pegasus represents grace and freedom. A character with a pegasus Patronus might be someone who values these qualities. They could be the type of person who is always looking for a way to break free from constraints, whether it's social norms or dark magic threats in the wizarding world. This Patronus could also suggest a connection to the skies and a more spiritual side of magic.
Thestral - hair wands in fanfiction are sometimes depicted as having a mind of their own. Because thestrals are such mysterious creatures, their hair in a wand could make the wand act on its own accord at times. This can lead to all sorts of interesting plot developments, like the wand leading the character into dangerous situations related to death and the afterlife, or it could be a key to unlocking some long - forgotten magic related to the cycle of life and death.
Thestral hair wands in Harry Potter fanfiction often make for interesting plot devices. Since thestrals are so rare and their hair is used in wands, it can signify a special or outcast character. In some fanfics, the wielder of a thestral - hair wand may have an easier time communicating with spirits or have a natural inclination towards necromancy, even if they resist it. It gives a lot of room for creativity in exploring the magical world further.
In 'Harry Potter Thestral Animagus' fanfiction, a common theme is the use of the Thestral Animagus form for protection. The character might transform to protect their friends or Hogwarts from dark forces. Another theme is the exploration of the relationship between the Animagus and their Thestral nature. How does it change their understanding of magic? How does it impact their relationships with other characters? These are often explored, along with the idea of how this unique form fits into the overall magic system of the Harry Potter world.
There might be a fanfiction where a group of Hogwarts students try to study Thestrals more closely. They face many challenges as not everyone can see the Thestrals, and they have to find creative ways to understand their behavior and magic. This could involve using special spells or potions.