They are good as they can introduce new relationships. Suppose a small change makes two characters who were just acquaintances in the original become friends or rivals. This can create new sub - plots. For example, if two students from different houses start to collaborate on a project because of a small change in the fanfiction's setup. It would add more depth to the story.
Small changes can enhance the magic system. Maybe a small alteration in how a certain type of magic is taught or practiced. For instance, if the way to master the Patronus charm is changed a little. It can make the characters' journey to learn magic more interesting and also lead to different outcomes in dangerous situations, like when facing Dementors.
One good small change could be in the character development. For example, Neville could start showing his courage a bit earlier in the fanfiction. This would add an interesting twist as it would make the story deviate slightly from the original in a positive way. It could also change the dynamics within the group of friends at Hogwarts.
In fanfiction, 'Harry Potter changes Westeros' could be through his magic skills. For example, his spells like Wingardium Leviosa could be used to move heavy objects in Westeros, which might change the way battles are fought or construction is done. His knowledge of the magical world could also introduce new concepts to the people of Westeros.
In some fanfiction concepts, he might change his soul through powerful magic spells. Maybe he discovers an ancient spell in a hidden book in the Room of Requirement that has the power to transform his very essence, his soul.
In the fanfic, there might be changes in the security measures of Azkaban. For example, new spells or wards could be added to prevent prisoners from escaping more effectively.
Often, he becomes more self - reliant. Since he can't always count on others during the summer away from Hogwarts, he learns to solve problems on his own. For instance, if there's a magical creature causing trouble near the Dursleys' house, he has to figure out how to deal with it without the help of teachers or friends right away.
In fanfiction, Harry Potter often brings changes to Hogwarts' social structure. His own group of friends, which includes students from different houses, encourages more inter - house unity. This breaks down some of the traditional rivalries between houses, leading to a more harmonious Hogwarts environment. Also, his reputation as a hero might lead to more students aspiring to be like him, which could change the general attitude towards heroism and bravery at the school.
Often, Lily is changed in terms of her backstory in Harry Potter fanfiction. Some fictions might give her a more adventurous youth, perhaps she traveled more in the wizarding world or had secret magical training. Her personality can also be tweaked. Instead of being the rather gentle and kind - hearted Lily from the books, she could be more feisty or more of a rebel in fanfic. This might change how she interacts with other characters like James Potter, making their relationship more of a love - hate thing at first rather than the somewhat straightforward romance in the original.
In this 'harry potter changes the north fanfiction', it's possible that Harry Potter is sent on a mission to the North to stop some sort of dark magic that is spreading there. He has to adapt to the unique magical and non - magical aspects of the North. He could end up using the local knowledge and magic to his advantage, and in the end, not only defeats the dark magic but also changes the North in terms of its magical and social structure. He might inspire the local wizards or witches to be more open - minded and collaborate with the rest of the wizarding world.
A major impact would be on the economy. In the Harry Potter world, there are unique magical items and potions that could be introduced to Westeros. For instance, the Felix Felicis potion could be used by merchants to have good luck in their business dealings. This would change the way trade is conducted. Also, the introduction of magical beasts like hippogriffs could be used for transportation, which would revolutionize the travel and delivery industry in Westeros.
Small changes can have a domino effect. If, say, Kakashi was more open about his past earlier, it might make Naruto more determined to solve the mystery of his father's death sooner. This could lead to him training harder and perhaps unlocking new powers faster. So, it can speed up or slow down character development and plot progression.