The chain around his throat felt very heavy. He touched one of the crystals lightly with the tip of his little finger. Such a small thing to hold the power of life and death. It was made from a certain plant that grew only on the islands of the Jade Sea, half a world away. The leaves had to be aged, and soaked in a wash of limes and sugar water and certain rare spices from the Summer Isles. Afterward they could be discarded, but the potion must be thickened with ash and allowed to crystallize. The process was slow and difficult, the necessaries costly and hard to acquire. The alchemists of Lys knew the way of it, though, and the Faceless Men of Braavos . . . and the maesters of his order as well, though it was not something talked about beyond the walls of the Citadel. All the world knew that a maester forged his silver link when he learned the art of healing—but the world preferred to forget that men who knew how to heal also knew how to kill.

Cressen no longer recalled the name the Asshai’i gave the leaf, or the Lysene poisoners the crystal. In the Citadel, it was simply called the strangler. Dissolved in wine, it would make the muscles of a man’s throat clench tighter than any fist, shutting off his windpipe. They said a victim’s face turned as purple as the little crystal seed from which his death was grown, but so too did a man choking on a morsel of food.

And this very night Lord Stannis would feast his bannermen, his lady wife . . . and the red woman, Melisandre of Asshai.

I must rest , Maester Cressen told himself. I must have all my strength come dark. My hands must not shake, nor my courage flag. It is a dreadful thing I do, yet it must be done. If there are gods, surely they will forgive me. He had slept so poorly of late. A nap would refresh him for the ordeal ahead. Wearily, he tottered off to his bed. Yet when he closed his eyes, he could still see the light of the comet, red and fiery and vividly alive amidst the darkness of his dreams. Perhaps it is my comet , he thought drowsily at the last, just before sleep took him. An omen of blood, foretelling murder . . . yes . . .