Well, it's not a straightforward yes or no. Usually, it depends on various factors like how closely it adheres to the main storyline and if it's been endorsed as canon by the production team.
It changes the canon by introducing a new form of interaction between Voldemort and Harry. Instead of just the typical battles and mind - reading attempts we see in the original books, the 'plugging' concept adds a more invasive and direct connection. For example, Voldemort could directly influence Harry's thoughts and actions in ways that were not possible in the canon.
Harry Potter's wand was made of holly wood, with phoenix tail feathers as the core. This wand, made by the famous wandmaker Garrick Ollivander, has a special connection to Voldemort's wand (made of ebony and dragon heartstrings), because they both come from the same phoenix tail feather. Harry's wand was about eleven inches long, and it was elastic, which made it very sensitive and accurate when it worked. This wand was very important to Harry, and it played a vital role in his fight against the Dark Arts.
While waiting for the TV series, he could also click on the link below to read the classic original work of "The Legend of Mortal Cultivation"!
Well, this fanfiction distorts the original idea of good and evil in the Harry Potter canon. Hermione is supposed to be on the side of good, but as Voldemort's daughter, it blurs the lines. It could also impact the relationships between characters. Her friends like Harry and Ron might have a hard time trusting her at first. And from a magical heritage point of view, it adds a new layer to the already complex world of wizarding bloodlines. It might make readers question the importance of blood purity in a different way than the original story did.
The fusion could be shown as a chaotic yet beautiful event. Sparks could fly from the wands as they touch, and the magic within them could seem to fight at first, like two different forces trying to assert dominance. But then, as they start to meld, the chaos gives way to harmony. The colors of the magic, say the warm red - gold of Harry's wand and the cold, steely grey of the Elder Wand, could blend into a new, unique color. And the resulting fused wand would look as if it was crafted by the most skilled wand - maker, with an otherworldly beauty and an aura of great power.
In fanfiction, if Harry Potter's wand fuses with the Elder Wand, it could potentially create an extremely powerful magical object. Harry already has a strong connection with his own wand, and the Elder Wand is known for its near - omnipotent power. The fusion might result in him having an unrivaled control over magic, perhaps being able to perform spells with ease that were previously difficult or even impossible. It could also change the balance of power in the wizarding world, as he would be in possession of a wand that combines the loyalty and unique properties of his original wand with the raw power of the Elder Wand.
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.