We can be anywhere and we can be everywhere. We are able to travel through mirrors, show you your fate. We promise you will hate it. Expect us soon. We will come.

The Lilim is the servant of the The Mother of Snakes . The Mother of snakes blesses these women with the ability to travel through mirrors, see people as they truly are, and the agility and stealth of a serpent, though they often develop serpentine features. 

They aid their Mother in driving victims insane, slowly showing the "true" self to the victim, often a horrible, exaggerated caricature of the victim's body and personality. They are able to change what people see in the mirror to do this.