The Raven's Teeth

"Six years ago in King’s Landing, Dunk had seen him with his own two eyes, as he rode a pale horse up the Street of Steel with fifty Raven’s Teeth behind him. [...] He stared so hard that Bloodraven felt it. The king’s sorcerer had turned to study him as he went by. He had one eye, and that one red. The other was an empty socket, the gift Bittersteel had given him upon the Redgrass Field. Yet it seemed to Dunk that both eyes had looked right through his skin, down to his very soul. Despite the heat, the memory made him shiver."
- The Sworn Sword, George R.R. Martin