Can you give an example of the role of 'the arithmancer' in the Harry Potter fanfic?

Well, in the Harry Potter fanfic, 'the arithmancer' could be a really interesting figure. Since Arithmancy is a rather complex and less - explored aspect in the official Potter lore, in fanfics it can be expanded upon. The arithmancer might be someone who uses number - based spells, perhaps to unlock hidden secrets or solve magical mysteries that are tied to numerical values. Maybe they are a teacher at Hogwarts in the fanfic, teaching students how to use numbers to their magical advantage.

There might be a fanfic where the plot is just a jumbled mess. Let's say it starts with Harry being in a different dimension where magic doesn't exist, but then suddenly he has all his powers back without any proper explanation. And the writing style is so choppy and the dialogue so stilted that it's really hard to get through. This would be a prime example of a not - so - great Harry Potter fanfic.

I'm not sure of a specific 'Harry Potter palindrome fanfic' off the top of my head. But it could be something like a story where the prophecy is written as a palindrome. For example, 'Otto saw I, I saw toot' where 'Otto' could be a character's name and the prophecy has a hidden meaning related to Harry Potter's destiny.

Sure. One example could be a fanfic where a character discovers a hidden grotto near the Black Lake. When they enter, a magical waterfall suddenly appears and drenches them. That's a 'wet surprise'.

A story where Harry is a detective in a modern - day city and has no connection to magic or the Potter - like world at all. This would be an example where he is not part of a Potter fanfiction as it completely deviates from the Potter universe's concepts.

In a different fanfic, Ron stumbles upon a diary that belonged to one of the original Hogwarts students. In it, he finds the knowledge of a secret dueling technique that was long forgotten. Ron practices this technique and when he faces off against a bully in the school, he uses this new - found knowledge to defeat him easily. His knowledge of this special dueling method gives him the power to stand up for himself and others, which is a great example of how 'knowledge is power' can be shown in a Harry Potter fanfic.

Sure. In one plot, Voldemort returns with an army of new dark creatures. Hogwarts is under siege. The teachers tell the students to save themselves as they try to hold off the attackers. The students then have to use their knowledge of hidden passages and spells they've learned on their own to escape through the Forbidden Forest.

I haven't actually read a fanfic specifically about 'Timely Errors', but it could be something like a character forgetting to cast a protection spell right before a dark wizard attacks. That would be a very timely error with serious consequences.

Since we don't really know what 'pein' is precisely, it's difficult to give a specific example. But generally, if 'pein' was a new type of magic or a new character, an example could be a story where Harry Potter has to face a challenge related to 'pein' magic that no one in the original books has encountered before.

One example could be a fanfiction where the duo is Hermione and Draco. The story might be about how they are forced to work together on a secret project in Hogwarts and gradually change their opinions of each other.