Well, in fanfiction, the teeth of a werewolf can be used as a very unique wand - making material. They can add an element of wildness and unpredictability to the wand's magic. The antlers of a stag that has magical properties, like one related to a Patronus, can also be used. This can make the wand more attuned to positive and protective magic. And there are fanfictions where the silk spun by a giant spider is used, which can make the wand have a connection to the dark arts, but also a certain elegance in its magic.
One unique material in fanfiction is the bark of the Whomping Willow. Since it's a very powerful and somewhat sentient plant in the Harry Potter world, its bark might be used to make wands with a strong protective magic. Also, the venom of a basilisk is sometimes used. However, it's extremely dangerous to handle. It can give the wand a very dark and powerful magic if used correctly in fanfiction. And then there are the tears of a phoenix, which are said to make wands with great healing abilities.
In fanfiction, some really unique materials for wand - making are dragon heartstrings from rare dragon breeds. For example, a heartstring from a Norwegian Ridgeback. Another could be the scales of a mermaid, which are said to give wands an affinity for water - based magic. And there are also mentions of using the feathers of a thunderbird, which can bring an element of air and electricity to the wand's magic.
Some fanfictions explore the idea of wands having emotions. For example, in 'The Sentient Wand', the wand can feel joy, sadness, and even love towards its owner. This changes the dynamic of how the wizard - wand relationship is perceived.
In fanfiction, a Harry Potter wand could be used for alchemy by focusing the wizard's magical energy. The wand acts as a conduit, directing the power needed to transform substances. For example, it might be used to change base metals into gold, similar to the concept of alchemy in the real - world history of magic. The wand's unique wood type and core could also influence the alchemical process, with different combinations having different effects on the transmutation.
In fanfiction, the staff could be used as a more powerful and versatile tool. It might be able to cast a wider range of spells simultaneously compared to a wand. For example, it could create large - scale protective barriers or complex illusions all at once.
In some fanfiction, the Golden Unicorn Wand can communicate with magical creatures. So Harry can use it to ask the advice of unicorns, which are known for their purity and wisdom. This gives him an edge in battles as he can get insights that no other wizard has.
In some fanfictions, Harry's wand has the power of elemental control. It can summon fire, water, earth, or air to protect Harry or attack his enemies. For instance, when facing a group of dementors, he can use his wand to create a wall of fire.
Often, the most powerful wand in fanfiction is described as having great precision. For example, it can cast spells with pinpoint accuracy, hitting the tiniest of targets. It may also have a very strong connection to the wizard who wields it, almost like an extension of their own magical essence.
He might choose a phoenix feather because it represents rebirth and magic. And for the wood, perhaps he'd pick holly, which is often associated with protection in the wizarding world.
The Basilisk fang wand could be used to explore the Forbidden Forest in new ways. Since Basilisks are powerful and feared creatures, the wand might allow the wielder to communicate with some of the more dangerous and intelligent forest dwellers, like the centaurs or the Acromantulas in a unique way that normal wands can't.
In Harry Potter fanfic, one unique feature of wand making can be the use of rare or experimental wand cores. For example, some fanfics might introduce a core made from the scales of a magical sea creature. This would add a whole new dimension to the wands' powers.
Well, it really depends on the fanfiction writer's creativity. Some might create a new, super - powerful wand that has unique properties. However, if we stick to the lore established in the original books, the Elder Wand is a top contender for the most powerful wand. It was crafted by Death itself, according to the legend, and has passed through many powerful hands over the centuries, which adds to its allure and perceived power.