Situation: I have Dragon Skull (Attached character gets -2 STR and is killed if its STR is 0. Response: After Dragon Skull comes out of Shadows, attach it to an opponent's character or discard it from play.) in shadows.
I have Margaery Tyrell (Response: After a card comes out of Shadows, choose a non-Lady character. Until the end of the phase, treat that character as if its printed text box was blank) on table.
My opponent has the terrifying Knight of the Rainwood (No attachments except Weapon. Knight of the Rainwood cannot be discarded from play) on the table.
I bring Dragon Skull out of Shadows. Can I trigger Margy's response to blank Knight of Rainwood's text before I trigger the Dragon Skull's response, which would attach itself to the Knight? In other words, can I use Margy before the Skull to kill the Rainwood?