The Nephilim - the bogeyman for monsters, and all those who could be monsters.
I'll just have them change the entry in the demonology textbook from 'almost extinct' to 'not extinct enough for Alec. He prefers his monsters really, really extinct.' Will that make you happy?
So you're a Shadowhunter,' Nate said. 'De Quincey told me that you lot were monsters.' 'Was that before or after he tried to eat you?' Will inquired.
I know there are monsters on this earth,' said Tessa. 'You cannot tell me otherwise. I have seen them.
He had become a monster. You just couldn't see it...because it wore the face of a friend.