He could find that the fanfiction has a different take on the history of the wizarding world. This might make him question some of the things he thought he knew. For example, if the fanfiction has a different origin story for a magical creature or a different version of how Hogwarts was founded. It could also give him ideas on how to deal with the challenges he faces in his own life at Hogwarts, such as dealing with bullies like Draco Malfoy or getting better grades in his classes.
Well, he might discover a whole new world of magic in that fanfiction. Maybe it contains spells that are not in the original books. He could get inspired to try out new things or it could even lead him to new adventures within the Hogwarts library, like finding a hidden section related to the ideas in the fanfiction.
Naruto could find a book that tells the story of a great hero who was just like him, full of energy and a desire to protect. This could inspire him to new heights. He might also accidentally trigger a trap or a hidden mechanism in the library while exploring, leading to an adventure filled with challenges and puzzles to solve.
Well, if Harry Potter finds Excalibur, it could completely change the wizarding world. He might gain some new powers from the sword. Maybe he could use it to defeat Voldemort in a more epic way than with his own wand. It could also bring a new alliance between the wizarding world and some other magical beings who respect the power of Excalibur.
In such a fanfiction, Naruto might take the child under his wing. He could start teaching the child some basic ninja skills, like how to throw a kunai properly. Maybe he'd also share his own experiences of growing up as an outcast in the village, inspiring the child to be strong.
Well, if Harry Potter finds the Mask of Zen - Aku, it could lead to a lot of chaos. Maybe the magic of the mask would interact in strange ways with Harry's own magic. He might struggle to control the power of the mask and find himself in situations where he has to make difficult choices between using the mask's power for good or being corrupted by it.
Snape might suspect that there is some dark magic at play. Given his knowledge and expertise in the Dark Arts, he would immediately look into any signs of foul play. He could also be conflicted because on one hand, Harry is a student he has had many issues with, but on the other hand, he is also an important figure in the fight against Voldemort. So he would have to decide whether to report Harry's disappearance or try to handle it privately.
He could end up selling the devil fruit. In some fanfictions, devil fruits are extremely valuable and sought - after items. Harry might not want the power or the responsibility that comes with it, so he decides to cash in on it. But this could also attract all kinds of unwanted attention from powerful and dangerous characters who want the fruit for themselves.
In fanfiction, the possibilities are endless. It could be that they go on an adventure to a previously unknown magical land or face a powerful dark wizard who was thought to be defeated.
Well, it could go in many directions. They might travel to a previously unknown magical realm or encounter creatures that were only hinted at in the original series.
Well, in such a fanfiction, Harry Potter might use the genie's wishes to defeat Voldemort once and for all. Maybe he wishes for a super - powerful magical artifact that can nullify the Dark Lord's magic.
Well, in such a fanfiction, Harry Potter might discover a magical mask with special powers. It could be a mask that allows him to see through disguises, like those used by Death Eaters. Maybe it was left behind by an ancient wizard and holds the key to some long - forgotten mystery in the wizarding world.