To say Magnus had had an eventful day would be somewhat of an understatement what with demons and shadowhunters from alternative dimensions, not to mention getting his magic back.
Perhaps he hoped that things would calm down once alternative Clary and Jace left. Unfortunately for his he didn't factor in two things.
Firstly years of neglect meant his magic wasn't as strong as he was used to which certainly made disposing of a dead demon challenging to say the least.
Secondly Alexander Lightwood, the tall, dark and frighteningly handsome mundane he'd met earlier, seemed determined to track him down.
Or what happens when the man who was flirting with you finds you in a dingy basement with a very dead demon..