14(Shadowhunters)

An Au where there is a bit of role reversal(Magnus in Clary's place, Raphael in Simon's but the ships can still be the same as canon...mostly because I adore Malec to not think of an au where they are together xD).

Magnus Bane is a hybrid of warlock/shadowhunter, a bit like Tessa, but his magic is much stronger because of his father being a Prince of Hell/Fallen Angel.

Magnus' mother was the child of a nephilim that was forced to marry Valentine and not take any runes for Valentine heard about Tessa's origin and wanted to make a few experiments which lead to Magnus' mother to make a deal with Asmodeus where he would help her run away as long as she gave him a child.

Asmodeus lead Magnus' mother to his favourite niece, Clarissa 'Clary' Fray, who opened her doors for Magnus' mother and let her and Magnus live with her.

Clary did erase a few of Magnus' memories but only those that mentioned the Mortal Cup or that had Asmodeus contacting(or sending 'gifts') to Magnus but he did know about the shadow world(just the basics).

Raphael and Magnus met at school and became friends even if Raphael denies it, when Raphael was forcefully turned into a vampire, Clary killed Camille(look, I don't like her so she can die but if you have an idea that involves Camille appearing later then you can just have Clary imprison her) while her best friend(Simon) took Raphael under his wings.

How would Alec and Magnus first meeting go? Clary gave her club to Magnus when he turned 20(Magnus would be a few years older then Clary was when she met Jace and the rest) and one day he noticed a group of shadowhunters enter in job mode so he decided to approach one to know if there was an actual reason for them being there or not with the person he approached being Alec(so no panicking 'mundane').

How anything else would go is up to the writer.