One common theme is love. Magnus' relationships, especially with Alec, are often explored. Another is power. His magical powers and how they are perceived by the Shadowhunters are frequently a part of the stories. Also, acceptance. Magnus being a Downworlder, his fight for acceptance among the Shadowhunters and the mortal world is a common theme.
One common theme is acceptance. Alec has to come to terms with his feelings for Magnus in a world that may not always be accepting, and Magnus has to accept Alec's insecurities and growth. Another theme is sacrifice. They often have to sacrifice personal desires for the greater good of their relationship and the Shadowhunters world.
The story should also stay true to the essence of 'Shadowhunters'. This means including the magic, the different species like warlocks and vampires, and the overarching themes of good versus evil. If it can add something new to the existing lore while still feeling like part of the 'Shadowhunters' world, it's a great fanfiction.
I really like 'Alec & Magnus: A New Beginning'. In this fanfiction, it starts with a scenario where Alec and Magnus have to rebuild their relationship from scratch after a big misunderstanding. It's interesting to see how they navigate through their differences and insecurities. There's also a fanfic called 'The Adventures of Alec and Magnus' which is more action - packed. It takes them on various quests where they not only fight demons but also strengthen their bond along the way.
One great 'Shadowhunters Magnus OC Fanfiction' is 'The Unseen Bond'. It focuses on an original character who forms a deep connection with Magnus. The story is well - written, with vivid descriptions of the Shadowhunter world and Magnus' complex personality.
Love and relationships are also a big theme. When different universes collide in these crossovers, new love interests can be formed. It might be between a Shadowhunter and a character from another world, and this creates all kinds of drama and tension. It's not just about romantic love, but also friendship and loyalty among characters from different backgrounds. Another common theme is the fight against a common evil. Characters from different worlds might have to team up to defeat a powerful foe that threatens both of their universes.
Love is a very common theme. Since Clace is a couple, their relationship and the challenges it faces are often explored. Another theme is adventure. They are Shadowhunters, so they often go on quests and fight against demons.
Friendship is another big theme. Characters from both universes form new friendships. In many fanfics, you'll see Kurt from Glee becoming friends with Alec from Shadowhunters. They learn from each other's strengths and weaknesses.
The popularity of 'Shadowhunters Alec and Magnus Fanfiction' mainly lies in the chemistry between the two characters in the original series. Their relationship is complex and full of potential for exploration. Fans love to read different interpretations of how their love story could develop further.
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.
One common theme is isolation. Magnus might be isolated due to his unique powers or past traumas, which causes him pain. For example, in some fics, his immortality makes him feel alone.