One possible reason could be that the magic used against him is of a very dark and ancient nature that defies the normal healing spells. For example, if it's a curse created by a long - forgotten dark wizard with unique and unbreakable properties.
It might also be due to a lack of understanding of his condition. The healers in the story could be using the wrong methods because they misdiagnosed what is actually wrong with Harry. Maybe they think it's a common magical illness when in fact it's something much more complex, like a distortion in his magical core that they don't have the knowledge to address.
Perhaps the injury or ailment is tied to some sort of prophetic or fated event. In the world of fanfiction, it could be that the plot demands Harry remain unhealed for the development of certain story arcs, like a test of his strength or a way to bring about a particular character's transformation as they struggle to find a way to heal him.
Madam Pomfrey, the school healer, would be on the front lines. She has experience with treating all kinds of magical maladies among the students at Hogwarts. However, in this fanfiction, she may be stumped by Harry's condition and have to resort to unorthodox methods or seek outside help.
Fanfiction can sometimes deviate a lot from the original story. It might be that the official creators or those in charge of the Harry Potter brand don't want the characters to be misrepresented in fan - made stories, so they restrict access to it for Harry or anyone in the context of that world. Another aspect is that some fanfiction may have a negative or unethical undertone, and to protect the integrity of the original story, access is prohibited.
In this fanfiction, perhaps the goblins use their unique magic or potions to heal Harry Potter. Maybe they have some ancient healing arts that are not known to wizards. It could involve a complex ritual where they draw on the power of the earth or their own magical heritage to mend Harry's wounds, whether they are physical or emotional.
One possible reason could be that he was injured during a battle with dark wizards. Maybe he was hit by a powerful curse that affected his legs. Another reason might be related to some kind of potion gone wrong. For example, if he accidentally drank a potion that had negative side effects on his motor functions.
One possible plot could be that Harry has a very serious injury from a dark magic attack. Madam Pomfrey uses all her skills and some rare potions to heal him. During the process, Harry might have some vivid dreams or memories related to his past and his parents. As he slowly recovers, he also discovers some new magical abilities that seem to be a side - effect of the intense healing process.
One reason could be that the goblins have a reputation for unique and powerful magic. Harry might believe that the goblins can offer a different kind of healing that Madam Pomfrey can't. For example, if he has a curse that is of goblin origin, he might think the goblins are more likely to be able to remove it.
Obviously, Harry Potter and Madam Pomphry are the main characters. Harry is the one in need of healing, and Pomphry is the healer.
One important goblin could be Griphook. He's a well - known goblin in the Harry Potter series, and in this fanfiction, he might be the main goblin responsible for Harry's healing. He has knowledge of the secrets of Gringotts and could use that knowledge to aid in the healing process.
Another possible reason is that Harry is protective of their story. Fanfiction can be quite wild with different interpretations, and he might not like how some fanfictions try to rewrite their relationship. He has a deep - seated understanding of his bond with Hermione, and fanfiction that messes with that can be hard for him to tolerate. He might think that the real story is already great and doesn't need these made - up alterations.
In some fanfictions, Pomphry might discover a hidden power within Harry while healing him. This could lead to a whole new adventure for Harry as he tries to understand and control this power. It could also change the way he is perceived in the wizarding world. For example, if it's a powerful healing ability, he could start to be seen as a healer as well as a hero. Another plot could be that Pomphry has to deal with interference from dark forces while trying to heal Harry. They might try to stop the healing process to keep Harry weak or to use his injury for their own evil purposes.