It's hard to say exactly without more context. Generally, 'karma altered crossover fanfiction' might involve creating new storylines that combine different fictional universes while tweaking the idea of karma. Maybe it's about characters who have to deal with unexpected karmic consequences in a crossover setting. For instance, a character from a modern - day story enters a magical realm and their normal understanding of karma is turned upside down due to the different laws of magic and morality in that realm.
Another interesting concept could be a crossover with a historical setting. Imagine a world where historical figures' actions are judged by karma in a modern - day - like system. So, for instance, a cruel king from history might be reincarnated into a peasant in this fanfiction and has to endure hardships to pay off his bad karma.
One common theme is 'fish - out - of - water'. For example, when Karma is crossed over into a world very different from his own, like a magical fantasy world. He has to adapt to new rules and powers. Another theme is 'team - up'. He teams up with characters from the other series to fight a common enemy.
To start writing, it's also important to do some research if needed. If you're using a fandom that has a complex lore, make sure you understand it well so you can incorporate it into your karma crossover. For example, if you're crossing over with a Japanese anime that has a specific code of honor, think about how that relates to karma. Once you have all these elements in place, just start writing. Don't worry too much about making it perfect at first. You can always go back and edit later.
Character interactions are key. Seeing how characters from the Fate universe and those related to Karma interact, whether it's in conflict or cooperation, can make the story interesting. For example, how a Fate hero might react to the strict rules of Karma.
One great 'Fate Karma crossover fanfiction' is 'Fate's Karmic Twist'. It has an interesting plot where the concepts of Fate and Karma are intertwined in a unique way. The characters from both universes interact in unexpected scenarios, making it a captivating read.
One example could be a crossover between a superhero universe and a medieval fantasy world. In the superhero world, karma might be more about immediate good and bad deeds being rewarded or punished. But in the crossover fanfiction, when the superhero enters the medieval world, the karma system could be altered to be more about fulfilling a certain prophecy or destiny, which is a common concept in medieval fantasies. So the superhero has to adapt to this new view of karma while still using his powers.
There are also some Tumblr blogs dedicated to sharing Karma Akabane fanfiction, including crossovers. You can search for relevant tags on Tumblr like 'Karma Akabane crossover fic'. However, the content on Tumblr can be a bit more scattered, so it might take some time to dig through and find the really good ones.
One idea could be that Karma gets transported to the Naruto world. He could start off as an unknown entity and gradually get involved in the shinobi battles. Maybe he'd team up with Naruto and use his unique skills from Assassination Classroom to help in missions.
The Karma Seal can change Naruto's appearance. In some fanfictions, it might give him a more menacing look with strange markings spreading across his body.