If you're texting Magnus to say 'I think u r kewl,' I'm going to kill you.""Who's Magnus?"Max inquired."He's a warlock,"said Alec."A sexy, sexy warlock,"Isabelle told Max, ignoring Alec's look of total fury."But warlocks are bad,"protested Max, looking baffled."Exactly,"said Isabelle.

In this quote, Isabelle and Alec are telling Max, who doesn’t know who Magnus is, that Magnus is a warlock. Isabelle is hinting to Max that Magnus is attractive and Alec looks angry. Max then protests, saying that warlocks are bad, showing confusion. Isabelle then agrees with Max’s statement, seemingly confirming that yes, warlocks are bad. At the beginning of the quote, Alec is warning Max to not text Magnus and say something complimentary; if he does, Alec says he will kill Max.