What happens in the 'Harry Potter disappears to train' fanfiction?

It could be Dumbledore. Even if he's dead in the original story, in fanfiction, anything is possible. He might have left behind some kind of magic that allows him to train Harry from beyond the grave, or he could have faked his death to take Harry to a secret location for training.

In fanfiction, if Harry Potter disappears, it could lead to chaos at Hogwarts. His friends like Hermione and Ron would likely be on a desperate search for him. They might suspect the Dark forces at work again, and start investigating all the possible places where Harry could have been taken or hidden.

One possibility in this fanfiction is that Naruto's training with the Kyuubi helps him to better understand the nature of chakra itself. He could discover new ways to combine his own chakra with that of the Kyuubi, creating a unique and extremely powerful form of energy. This new form of chakra could give him an edge in future battles against powerful enemies. Also, his time training might be filled with various challenges and trials set by the Kyuubi, which would test his resolve and determination, making him an even stronger ninja in the end.

Well, usually in 'Harry Reclaims Potter Heirlooms Fanfiction', Harry discovers new things about his family heritage. He could find ancient magical items that have been lost for generations. These heirlooms might give him new powers or knowledge. For example, he might find a special wand that was passed down in the Potter family which has unique abilities. And he may have to fight against some old enemies of the Potter family who don't want him to have these heirlooms.

In this fanfiction, perhaps Harry might face many challenges while trying to keep Norbert hidden. He could be sneaking around Hogwarts, making sure Norbert is fed and taken care of without getting caught by the teachers. Maybe he enlists the help of his friends like Ron and Hermione to create a secret hiding place for Norbert.

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.

Perhaps Harry is kidnapped by a mysterious and powerful magical being. This being has the ability to make Harry disappear without a trace. His friends then embark on a dangerous quest to find him, facing many magical challenges along the way. They might have to search in hidden and dangerous parts of the wizarding world that they have never been to before.

The setting in which Harry disappears and returns also matters. If it's in the middle of Hogwarts, the school would be in chaos. Teachers would be trying to keep the students calm while secretly searching for Harry. And when he returns, the reactions of different houses - Gryffindor being relieved and proud, Slytherin perhaps being suspicious - could add more layers to the story.

He might end up in a place where he can't see clearly without his glasses and struggles to find his way. For example, he could be in a dark forest where he stumbles around, trying to figure out where he is and how to get back. Without his glasses, his magical abilities might also be affected in some way, like his spell - casting accuracy.

One possible scenario could be that the entire wizarding world falls into complete chaos. With Harry gone, there's no one to oppose Voldemort directly. The Death Eaters might take over Hogwarts and turn it into a dark academy, teaching dark magic and suppressing any form of resistance. The Order of the Phoenix would be in disarray, losing their main hope.