His reaction would likely be very different. At first, he might be angry that he didn't know this before. But then, he could start to see opportunities. He may think that if he can somehow control Harry as a Horcrux, he can gain more power. So, he might change his strategy from simply trying to murder Harry to trying to subdue him in a different way.
Well, it depends on how the author writes it. Maybe Voldemort would initially be in disbelief. But once he accepts it, he could start to manipulate Harry in different ways. He might think that by controlling Harry, he can control the Horcrux within him. This could create some really interesting plot twists where Harry has to resist Voldemort's attempts at a much deeper level than just physical attacks.
He might learn about hidden magical talents in his family. For example, perhaps there were ancestors who could communicate with magical creatures in a unique way that was lost over time.
It could be about Harry Potter learning some long - forgotten or lost magical arts. Maybe he discovers ancient spells, potion - making techniques that have been lost for centuries, or unique forms of divination that are no longer practiced in the wizarding world.
Well, it could be about Harry exploring traditional or ancient magic methods, perhaps things that were long forgotten in the wizarding world. Maybe he discovers old spells, or ways of divination that were practiced ages ago.
It might be a story where Harry delves into the family magic in order to solve some sort of mystery. For example, he could be looking for a way to defeat a new dark force and realizes that the family magic holds the key. He could learn new forms of magic related to protection or divination that are unique to his family.
The 'harry learns the old ways fanfic' is likely centered around Harry's exploration of archaic knowledge or practices. It could be that he discovers an old library filled with dusty tomes that hold the secrets of the old ways. As he reads and learns from these, he might start to incorporate these old ways into his daily life in Hogwarts or his battles against the dark forces. He could learn things like how wizards used to communicate without wands, or ancient forms of defensive magic that have been long forgotten by most in the modern wizarding world.
There are not many fanfictions that would combine Daphne, Voldemort and Harry in the context of handfasting in a traditional sense. Handfasting is often associated with a form of magical binding or marriage - like ceremony in the wizarding world in fanfiction. However, if it exists, it would likely be a very dark and complex story. Maybe Daphne could be caught in the middle of the eternal battle between Harry and Voldemort, and the handfasting could be some sort of dark ritual Voldemort forces upon them. But this is all speculation as it's not a common or typical fanfiction trope.
The 'harry learns both sides of the force fanfic' might be a story where Harry is thrust into a situation where he discovers the duality of the Force. It could show his journey as he tries to understand the good and bad aspects of this powerful energy. For example, he might meet characters from the Star Wars universe who teach him about the Force, and he then uses this knowledge in his own battles or moral dilemmas back in the wizarding world.
In this kind of fanfiction, it often shows Ginny's shock and the complex emotions she might have. She might be worried about Harry's fate, as being a Horcrux means he is tied to Voldemort in a very dangerous way. This discovery could lead to her trying to find a way to break the Horcrux connection without harming Harry.