Love is a very common theme. Their relationship, which is between a Shadowhunter and a warlock, is full of challenges and the fanfics often explore how they overcome these through love. Another theme is acceptance. Alec has to accept Magnus's different lifestyle as a warlock, and Magnus has to accept Alec's duties as a Shadowhunter.
One common theme is the exploration of their cultural differences. Alec comes from a very traditional Shadowhunter family, while Magnus has his own unique warlock culture. Fanfics often show how they bridge this gap. Also, the theme of loyalty is prominent. They are loyal to each other in the face of various threats and opposition from the Shadowhunter society. For example, in many fanfics, Alec stands up for Magnus against the more conservative Shadowhunters.
The theme of growth is also common. Both Alec and Magnus grow as individuals because of their relationship. Alec becomes more open - minded and Magnus becomes more in tune with the Shadowhunter world. Additionally, the theme of magic and its role in their relationship is often explored. Magnus's magic is a big part of who he is, and it often plays a role in how they interact, whether it's for protection or for creating special moments between them in the fanfics.
One common theme is love and relationship development. It shows how Magnus and Alec's relationship grows and overcomes various obstacles. Another theme could be adventure, where they go on quests together while being in a relationship.
Love and acceptance are big themes. In many fanfics, Alec has to come to terms with his feelings for Magnus, a warlock, which goes against what he has been taught as a Shadowhunter. Also, there is the theme of sacrifice. Sometimes one of them has to sacrifice something for the other's safety or well - being, which really shows the depth of their love.
One common way could be through using his magic in a subtle way. For example, he might use magic to create situations where Alec has no choice but to follow his lead. Maybe he makes it seem like the only option for Alec to protect his friends or family is to do what Magnus wants.
Another theme is the struggle against prejudice. Since they are from different 'worlds' in the story, they face a lot of judgment from others, and fanfictions often deal with how they overcome this. Also, the theme of self - discovery is quite common. Both characters grow and learn more about themselves through their relationship with each other.
Love is a very common theme. Their love story, how they overcame differences to be together. Another is the theme of acceptance, like Alec accepting Magnus' warlock nature and Magnus accepting Alec's Shadowhunter duties. And also the theme of family, as they both have different family backgrounds and how they merge their families in a way.
A frequent theme is also the power dynamics. Magnus has his powerful magic, and Alec has his position in the shadowhunter world. How they balance this in their relationship is often explored. Also, the theme of family acceptance is common. Alec's family and their reactions to his relationship with Magnus are often part of the stories.
Another theme is self - discovery. In human fanfictions, they might be on a path to find out who they are without the trappings of their original magical or shadowhunter identities. They learn about their strengths and weaknesses as normal humans.
One common theme is the exploration of new relationships. The addition of an OC often creates a new dynamic between Alec and Magnus. For example, the OC could be a mediator in their relationship, helping them understand each other better.
A major theme in magnus x alec fanfiction is the exploration of power dynamics. Magnus is a powerful warlock and Alec is a shadowhunter. How they balance their different levels of power and influence in their relationship is often explored. Also, the theme of acceptance is quite prevalent. They come from different worlds, and their journey towards accepting each other's differences is a key part of many stories. For example, in some fanfictions, Alec has to come to terms with Magnus's long life and his different magical practices.
Jealousy can also be a common element. In these fanfics, there might be instances where Alec is jealous of Magnus's past relationships or his popularity in the Downworld. Magnus, on the other hand, could be jealous of Alec's closeness to his Shadowhunter friends or family. Another aspect is fear of abandonment. Given their different natures and the challenges they face in their relationship, both characters may fear that the other will leave at some point.