Lucifer was not blind, but he wasn't sure if Istredd had any other rumors that would let Michael know his name.

"Ohhhh, that followed us even here?" The fact that the first time Istredd's hearing it is from Michael is just... really funny to Lucifer. And the fact that Michael heard it. Lucifer really wonders what he did with that.

"You really need to get out more if this is the first time you're hearing it, buddy."