Obsession Pure Heart || Shadowhunters (Malec)

Set after Shadowhunters Season 2 Episode 12

And great inspiration from OnceUponATimeInRiverdale

After when Magnus and Valentine switch back to their bodies, Magnus was still very terrified and upset about all the torture he had been when he was in Valentine's body, but Alec was always there for him whenever he feels sad and Magnus was so lucky to have a perfect boyfriend. But when Valentine was inside of Magnus's body, he started to feel like a connection he never felt before when he was with Jocelyn, and he felt like he and Magnus were meant to be together, and so Valentine have started to feel a dangerous obsession towards Magnus and vows to have Magnus heart and make him his king to rule the world. Alec wants nothing more but to protect the warlock he fall in love from the monster who wants to capture him for himself, and so Alec along with Clary, Simon, Isabelle, Jace, Raphael, and Maia all made a vow to protect Magnus from Valentine and his Circle Shadowhunters until they are brought to justice, but capturing them will not be easy, and Alec and Magnus will both soon realize is that their love is as strong as ever and will soon realize how much they need each other.