A possible plot could be that Clary starts having strange dreams during her pregnancy. These dreams could be some sort of premonition or a connection to the baby's future powers. Magnus, being the warlock he is, tries to decipher these dreams using his magic. Meanwhile, they have to prepare for the baby's arrival in a world filled with demons and other supernatural threats. They might also seek advice from different characters like Jace or Isabelle, and each interaction could bring new perspectives and challenges to their situation.
One idea could be that Magnus and Clary discover the pregnancy unexpectedly. They then have to deal with the reactions from their friends and family. Some might be overjoyed while others could be worried about the challenges ahead.
One plot idea could be Magnus trying to balance his powerful magic with the changes in his body during pregnancy. He might be worried about how his magic could affect the unborn child. Another could be the reactions of his friends and family. For example, Alec might be over - protective and trying to keep Magnus safe from all the possible threats in the Shadowhunter world. And Magnus could also be facing challenges from the Downworlders who might see his pregnancy as a sign of weakness or a change in the power dynamics.
One idea could be exploring how Clary's relationships with her friends and family change. For example, her friends might rally around her to support her during the pregnancy. Another could be the challenges she faces in her daily life, like dealing with morning sickness while still trying to be part of the action in her world. Maybe she has to learn new magical ways to take care of herself and the baby since she's in a unique situation.
One plot idea could be Clary dealing with the changes in her relationships. Her friends might be overly protective, and Jace could be both excited and worried about becoming a father. Another could be Clary's struggle with her Shadowhunter duties while pregnant, having to balance her need to protect the world and her unborn child.
The Seelie Queen could be an antagonist. She might see the unborn child as a threat to her power or a valuable asset to control. So, she could try to manipulate Magnus and Clary throughout the pregnancy.
It can lead to all sorts of interesting plot developments. Maybe it causes confusion or brings them closer together.
A really cool plot could be that there's a prophecy that involves both Percy and Magnus. They initially don't trust each other but as they start to work together to fulfill the prophecy, they realize that they have more in common than they thought. Along the way, they might meet other characters from both of their stories, and there could be some epic battles and heart - warming friendships formed. There could also be a love interest involved, perhaps a character from one world falls for a character from the other world, adding a bit of romance to the mix.
One possible plot twist could be that Sebastian's true motives for getting Clary pregnant are revealed to be part of a larger, darker scheme. Maybe he plans to use the baby for some sort of power - play within the Shadowhunter world.
In fanfiction, the Clary and Magnus kiss is often a very passionate and significant moment. It can represent a deepening of their relationship, whether it's a newfound connection or a strengthening of an existing bond. Writers might use this kiss to show the characters' growth, as Clary might be becoming more open to the magical world that Magnus represents, and Magnus might be letting his guard down more around Clary.
One idea could be the discovery of new powers within the Staff of Magnus. Maybe it has the ability to open portals to different magical realms that were previously unknown in the Harry Potter universe. This could lead to adventures where the characters explore these new places and encounter unique magical creatures.
One idea could be a crossover where Percy and Magnus have to team up to defeat a common enemy that threatens both their worlds. Maybe a primordial being that can disrupt the balance of both the Greek and Norse mythologies.