The entirety of New York City’s downworlder population know or know of Magnus Bane. The High Warlock of Brooklyn is not a title left behind some trash can in an alley of Queens, it is flaunted at the fanciest parties in Brooklyn and Upper East Side.
And so it really comes as no surprise that when he starts dating a shadowhunter, Alec Lightwood’s name is spread about the same way. It is whispered in vampire dens, gossiped about in the Hunter’s Moon and Pandemonium is always on alert for any shadowhunters in its midst.
He’s the Lightwood’s son… He left his bride-to-be at the altar… He defied the Clave for a warlock… The Wolves almost killed his parabatai…
Seelies listen to the trees, wolves listen to the scattered word on the street, vampires all hear the new fledgling’s complaints (“he’s such an ass” or “sometimes I don’t get what Magnus sees in him” and “he does seem like a knight in shining armour, though”) and warlocks only have to look at Magnus’ affectionate expression whenever Alec’s name pops up in conversation to know he is something special.