In some fanfictions, it changes by giving Harry more direct control over life and death. For example, he can revive the dead or prevent people from dying in a way that was not possible in the original books.
Many fanfictions also change the concept by making Harry's role as the Master of Death a more public and world - changing thing. Instead of keeping it a personal journey like in the books, he uses it to influence the entire wizarding world. He might change the way wizards view death, funerals, and the cycle of life and death. This alteration allows for a lot of different plotlines and character developments that wouldn't have been possible with the more limited view of the concept in the original series.
Often, the concept is expanded to involve Harry having a deeper connection with the afterlife. He might be able to communicate with the souls of the dead more freely. In one fanfic, he becomes a sort of guardian between the living and the dead, using his Master of Death powers to keep the balance. This is different from the original where his connection to the Deathly Hallows was more of a plot device rather than an active role in the afterlife.
Well, in the original story, Harry was an orphan who had to figure out his place in the wizarding world on his own. But in 'Death Adopts Harry Potter' fanfictions, he has a very different kind of guidance. Death can offer him insights into magic that no one else could. For example, he might learn how to manipulate death - related magic, which could give him an edge against Voldemort. It completely changes the power dynamics.
In some fanfics, like 'The Master of Death's Dominion', Harry uses his new status to become a benevolent dictator of sorts in the wizarding world, changing the political structure. In others such as 'Harry, the Reluctant Master of Death', he is hesitant to use his power and tries to hide it. And in 'Master of Death: A New Era', his being the Master of Death ushers in a new age of magic with different rules.
In crossover fanfics, the 'Harry Master of Death' concept often gets expanded. For example, in a crossover with the Star Wars universe, his mastery over death might be translated into an ability to resist the dark side's allure, which is related to death in a different way than in the Potter universe. He could use his power to save characters from the brink of death in a more 'Star Wars - y' way, like using the Force in conjunction with his magic.
In some fanfictions, it makes Harry more confident. Since he knows he's the master of death, he feels a sense of purpose and power that he didn't have before. This newfound confidence allows him to take on Voldemort more fearlessly.
The Grey Lord concept often makes Harry more powerful and independent. He is less reliant on the established authorities in the wizarding world. He starts to make his own rules and form his own alliances, which completely changes the power dynamics in the Hogwarts and the wider wizarding community. He also has a different approach to dealing with threats, using his newfound wisdom and power in creative ways. This is in contrast to the more reactive Harry in the original books who often followed Dumbledore's lead.
Well, when it comes to the 'WBWL' concept in 'Harry Potter' fanfictions, it really turns the plot on its head. Consider the fact that the wrong boy being thought as the savior means that the real hero doesn't get the recognition and resources he needs early on. This can lead to a delay in the fight against Voldemort or the real dark forces. The wrong boy might be trained in a way that doesn't suit the real prophecy, and this can have far - reaching consequences for the wizarding world. Additionally, the relationships between characters are completely different. Teachers at Hogwarts might invest their time and energy in the wrong student, leaving the real hero to fend for himself or find other mentors. This all creates a whole new set of plot twists and turns compared to the original story.
In fanfictions, Harry's emancipation often means he can act more independently. For example, in some, he doesn't have to wait for Hogwarts to start learning magic. He can explore his powers on his own terms, which speeds up his development and changes the power dynamics with his enemies.
It changes the dynamic. In the original, they meet at Hogwarts. But in fanfictions with this concept, they grow up together. So they have a deeper emotional connection from the start. For example, they might be more in sync when facing challenges at Hogwarts.
The 'Godlike Magus' concept changes the relationships in the story. Other characters may view the Godlike Magus character with a mix of awe and fear. Enemies might be more cautious, and friends might rely on them more. Also, it can change the power balance in the wizarding world. Institutions like the Ministry of Magic may feel threatened by this newfound power and try to control or suppress it.
In fanfictions, when Harry is in Ravenclaw, his relationships often change. He might be closer to Ravenclaw students like Luna Lovegood earlier. His focus on academics would be more pronounced. For example, he could be more interested in the library and research.