Merlyn's anger over what happened to her mother and herself was mingling with her anger at Rhysand. She kept the door shut for a moment, letting the blood trickle down over it slowly, forming the words ''Someone's at the door.'. Those were last words to her beloved mother. She could use those words as weapons now. The door flung over once she felt certain Rhysand had read them. On the other side, he'd see one of his victims standing in his way and staring at him, due to a vision she had given him.