Well, it depends on the specific fanfiction. Some fanfic authors might see the connection between Fawkes and Harry and make Fawkes his familiar. Fawkes is a phoenix with special powers, and having it as a familiar could add an interesting dynamic to Harry's story in the fan - made versions. It could help him in various ways, like providing magical support or even acting as a sort of guide. But not all fanfictions will have this relationship.
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"!
In some fanfictions, Fawkes may start as just a magical creature that helps Harry occasionally. But as the story progresses, he could become more of a friend and a mentor to Harry, guiding him not just in magic but also in life decisions.
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.
There's a chance that the maker is a new character, an old hermit wizard who lives deep in the Forbidden Forest. He has been observing Harry from afar and realizes that the wands available in the regular market are not sufficient for him. So, he uses his knowledge of forgotten magics to craft a custom wand just for Harry.
The wand crafted by Merlin for Harry is special because it's not just a tool but a symbol of a connection between two great magical beings. Merlin, with his age - old wisdom, imparts a certain quality to the wand. It could have a unique resonance with Harry's soul. The materials used are likely to be of the rarest kind, and the way Merlin enchants it gives it an edge. It might be able to adapt to Harry's growth in magic more easily than other wands, and it could have hidden powers that are revealed as Harry faces different challenges in the fanfiction.
Harry would likely become more in tune with magic on a deeper level. Since Fawkes is a magical being full of ancient magic, Harry might gain new insights into spells and wizardry.
One reason could be the power aspect. Fawkes' magical abilities like healing with his tears and his flight can be very useful to Harry. So, fanfic writers may use this to make them a pair.
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.