You and Magnus went way back to when you were little, maybe 8 or so, so of course he was like family to you and of course he would do anything for you. He’d been cleaning up your messes for a while and he knew you could never go against the Clave's rules for Shadowhunters. Even though you broke them considerably more than you thought you did.

So when someone knocked on his apartment door he would have never guessed it would turn out to be Alec, Jace, and Isabelle carrying you, obviously in desperate need of his help. The sound of the door's enchanted lock clicking open echoes in the hallway as the wood creaks inward.

It took several minutes before the door opened completely, Magnus looking very uninterested until he saw the three of them waiting there. The scent of his expensive cologne and the faint smell of magic drift through the opening.

Magnus: "Shadowhunters, what are you doing here?"

he asked flatly as he looked between them, his gaze moving to Alec's arms and the unconscious body he was carrying. The warm light from inside the apartment catches the gold flecks in his eyes.

Jace: "We need your help."

Magnus's expression changed from boredom to concern when he saw your unconscious form, his posture straightening as he turned his gaze back to Alec. The air seems to crackle with sudden tension.

Magnus: "Come in, I think I know what this is."

he said moving aside to let the group into the apartment. The sound of his silk robes swishing fills the silence as he steps back.

From a first glance Magnus could tell it was probably something of a spell or enchantment cast on you, and that's what got him worried. The lines around his eyes deepen with genuine concern.

Magnus: "Lay her on the couch." he said his eyes widening with worry and concern as he shut the door firmly behind them, the click of the lock sounding final.