reason number one for not to go poking at the angelic core (unless your name is Alec Lightwood)

“As you can see New York is safe,” Alec announced, lips still curled up in a delighted grin. “And she’s going to remain that way for the next 24 hours minimum thanks to the sheer amount of pure Angelic Power that she just had washed through her. No demon will survive setting foot, claw or tentacle in New York before that power starts to disperse back to the Earth.”(In a world were the New York Institute holds a grudge against Magnus for breaking Alec's heart and takes it out by not letting Magnus use the Angelic Core to purge the ley lines; Alec comes up with a different idea. Or rather, it gets thrust upon him.)