The fanfiction could develop the story by delving deeper into the magic system. Since the Elder Wand is such a powerful and mysterious object, the author could use it as a tool to explain more about how wands work, their connection to the wizard, and the overall balance of magic. Harry's exploration of the Elder Wand could lead to revelations that change the way we view the wizarding world in general. For example, he might discover that the Elder Wand has a sentient side and can communicate its wishes or warnings to him, which would add a whole new layer to his character arc and the story as a whole.
It could develop the story by showing Harry's growth in handling power. With the Elder Wand, he has a great responsibility. The fanfiction might explore how he copes with the temptation to use it for personal gain, which was a theme in the original series. For instance, he could resist the urge to use it to make himself the most powerful wizard instantly.
One possible fanfiction could be where Harry uses the Elder Wand to restore Hogwarts to its former glory after the war. He might use its power to repair all the damaged parts of the castle and bring back the magic that was lost during the dark times.
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.
The story could develop with Harry facing new challenges related to the second wand. He might need to discover the secrets of the second wand, like what kind of wood it is made of and what core it has. This discovery process could be full of mysteries and danger.
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.
His character might become more independent. Since he has to adapt to a different wand, he can't rely on what he already knows about using his old wand. He would need to be more experimental with his magic. This could make him bolder in trying new spells and techniques.
In some fanfictions, if Harry Potter keeps the Elder Wand, he might use it to strengthen the magical defenses of Hogwarts. He could make the school impervious to dark magic attacks, ensuring the safety of the students and staff.
One possible fanfiction could involve Harry going back in time to prevent Voldemort's first rise to power. He uses the Elder Wand's immense power to manipulate time and change key events. For example, he could stop the death of his parents and thus change the whole course of the wizarding world's history.
One reason could be Harry's pure heart. The Elder Wand might be attracted to his selfless nature. Another could be his connection to Voldemort. Since they are linked in many ways, the wand might see Harry as the key to resolving that conflict.
In Harry Potter and the Deathly Hallows, the ownership of the Elder's wand was not explicitly stated. Although both Harry and Voldemort had tried to pick up the Elder Wand, Harry was eventually defeated by Voldemort, and the Elder Wand was returned to the Wizarding world, the power of justice was given to Snape, the Magical Safety Officer of Hogwarts School. According to the novel, the Elder Wand was considered one of the most powerful wands because of its ancient magical power and historical heritage, but it was also considered a dangerous and uncontrollable magical item because it could lead the holder in the wrong direction. Therefore, the problem of the ownership of the Elder's wand was not well resolved and became a suspense in the novel.
The Elder Wand choosing Harry has a huge impact on the plot. It gives Harry an edge over Voldemort. Since the wand is the most powerful, it makes Harry a more formidable opponent. It also adds an element of destiny to the story, as if Harry was meant to be the one to defeat Voldemort all along.