One possible victim could be a Shadowhunter who has seen something they shouldn't have, like a secret ritual of the warlocks. Magnus, in an attempt to keep the secret safe, kidnaps the Shadowhunter. Another could be a warlock child who is being hunted by a rogue group of Shadowhunters. Magnus kidnaps the child to protect them and raise them in a safer environment. Also, it might be a seelie who has been marked by a dark force, and Magnus kidnaps them to try and remove the mark before it causes chaos in both the seelie and human worlds.
The victim could be Alec Lightwood. Since Magnus and Alec have a complex relationship, a fanfiction could explore what would happen if Magnus kidnapped Alec, perhaps out of some miscommunication or a threat to Alec's safety that Magnus thought he could only handle by taking Alec away. Another potential victim could be a young, inexperienced warlock. Magnus might kidnap the warlock to teach them about their powers in a more secluded environment away from the prying eyes of the Shadowhunters.
It could be a mundane who has some sort of connection to the magical world that they are not even aware of. Magnus might kidnap them to protect them from those in the magical world who would use their connection for their own gain. Or it could be a character from another magical race, like a faerie. Maybe the faerie has some knowledge or power that Magnus needs to access, and he kidnaps them in order to get that information. Also, it could be a newly - turned vampire who Magnus believes is in danger from the vampire clans that want to control them.
It could be Clary. Since she is a very important figure among the Shadowhunters and has a lot of power, Magnus might kidnap her if he thought it would help him achieve a certain goal. Maybe he needs her unique rune - drawing abilities for a spell.
It could be a young and innocent bystander. Maybe someone who was just in the wrong place at the wrong time. For instance, a small child who happened to be near where Will and Phobos were planning their kidnapping and was grabbed instead of their intended target.
It could be Iris. Since she's an important character in The Flash's story. The Flash might be forced to kidnap her for some strange reason, like to protect her from a threat that he can't explain to her directly.
A young journalist who has been writing articles about Kaito Kid and his heists. Kaito Kid kidnaps the journalist to control the narrative. He wants to make sure that the journalist doesn't publish any more information that could give away his next moves or expose his secrets.
One possible plotline could be that Magnus Bane kidnaps someone in order to protect them from a greater danger. Maybe there's a powerful dark magic user after a young warlock, and Magnus takes the warlock to a hidden location. Another could be that Magnus is misjudged, and he actually didn't kidnap but was trying to rescue someone who was in a magically - induced coma and had to move them quickly. A third plotline might be that Magnus kidnaps someone as part of a deal with a demon, but then has a change of heart and tries to find a way out of the deal while keeping the kidnapped person safe.
A young boy who is the chosen one to bring about a new era of warmth could be the victim. Jack Frost kidnaps him to prevent the change in the world's climate that would come with the boy's power.
One possible plot for this fanfiction could be that Bane kidnaps Robin as part of a revenge plot against Batman. Robin is trapped in a dangerous situation, and he has to rely on his training and his mental strength to survive. Bane might taunt Batman with messages about Robin's kidnapping. As Batman races to save Robin, Robin also tries to find a way to free himself and help Batman in the process. The story could explore Robin's growth as a character while facing this difficult situation and the complex relationship between Batman, Robin, and Bane.
People who enjoy fantasy stories, especially those with magic and unique characters, would also be part of the target audience. The 'Magnus Bane Graphic Novel' might attract those who like to explore different fictional universes and the characters within them. Since it's a graphic novel, it could also appeal to readers who are into visual storytelling and comic - like art styles.
Maybe Harry Potter could have some of Magnus Bane's powers. For example, he could use magic in a more flamboyant and powerful way like Magnus. He might also get involved in the Shadowhunter world and face different challenges there.
You can find Magnus Bane fanfiction on platforms like Archive of Our Own (AO3). It has a large collection of fan - made stories about Magnus Bane.