In this type of fanfiction, an interesting idea could be the exploration of different Hogwarts houses' reactions to the concubine contract. Gryffindors might oppose it on moral grounds, while Slytherins could see it as a means to gain power or influence. Also, the idea of how the Ministry of Magic would regulate or react to such a contract could be really fascinating.
For a Harry Potter Azkaban contract fanfiction, perhaps there's a contract between a healer and the Ministry of Magic regarding Azkaban. The healer agrees to try and find a way to lessen the effects of the Dementors on the prisoners, but in return, they want access to some restricted magical knowledge. Or it could be a contract between two prisoners in Azkaban. They make a pact to break out together and seek revenge on those who put them there. They might use their combined magical skills and knowledge of the prison's secrets to plan their escape.
Perhaps the contracts having unforeseen consequences. Like the summoner losing a bit of their own magic each time they summon. It adds a layer of risk and drama to the story. In some fanfictions, the summoning contract might be tied to a specific family heirloom, which gives it a historical and mysterious aspect.
One interesting idea could be the complex relationship dynamics that develop due to the marriage contract. For example, Harry might have to navigate new social expectations and deal with characters who have different motives regarding the contract. It could also lead to unexpected alliances or rivalries within the wizarding world.
One idea could be that the peace contract is a magical document created by the Ministry of Magic to end a long - standing feud between two wizarding families. Harry could be involved in ensuring that both families abide by the terms of the contract.
A magical contract could be made between a young wizard and a magical creature. Maybe the wizard accidentally trespasses on the creature's territory and in order to make amends, they enter into a contract. The contract could involve the wizard helping the creature with a task, like finding a lost magical item in the Forbidden Forest. This would lead to all sorts of adventures and challenges as the wizard tries to fulfill their end of the bargain.
One interesting concept could be how the marriage contract affects the relationships between the characters. For example, it might force two characters who initially dislike each other, like Draco and Hermione, to get to know each other on a deeper level. This could lead to unexpected alliances and character growth.
A great plot in this type of fanfiction might involve the betrothal contract being a key to unlocking some long - forgotten magic. Harry and the other character involved in the contract (let's say it's a character from a different magical school) have to work together to figure out how to use this magic to defeat a new dark threat. They start off not getting along because of the forced betrothal, but as they learn more about the magic and each other, they develop a real bond.
Well, one interesting plot could be a marriage contract between Harry and a minor character that forces them to work together and they end up uncovering a long - forgotten dark magic secret in Hogwarts. Another could be a contract that was made by their families long ago and they initially dislike each other but as they fulfill the contract's requirements, they fall in love.
A common plot is when a marriage contract from the past resurfaces. Maybe a contract made between the Potter and Black families long ago. This throws Harry into a situation where he has to deal with Sirius' family history and the implications of such a contract. It could lead to him uncovering secrets about his family and the wizarding world's past, all while trying to figure out his feelings about the arranged marriage.
One interesting idea in 'Harry Potter' fanfiction is the concept of alternate universes. For example, a fanfic might explore what would happen if Harry was sorted into Slytherin instead of Gryffindor. This could lead to a completely different set of relationships and storylines. Another idea could be time - travel fanfics where characters go back in time to change certain events in the wizarding world's history. It adds a whole new layer of complexity and intrigue to the original story.