Seven days after Limpick became a priest, Melisandre took him to the lowest level of the castle.
He had passed that door many times—at the end of the corridor, iron-bound, no handle, just a palm-sized hollow shaped like an open hand. The stone frame was black, crusted with years of sulfur, rough and yellowish-white to the touch. Melisandre pressed her hand into the hollow. The door slid open without a sound. Inside, narrow stone steps spiraled downward, wide enough for only one person. Dragon glass was set into the walls every few feet—jet black, glowing with its own faint dark-red light, exactly like the glow in the cavern under Harrenhal.
"Follow me," she said, lifting her robe and starting down. Limpick stayed right behind her, one hand on the wall. The stone was warm—warmer than anywhere else in the castle—like a massive fire burned somewhere far below and had baked the entire mountain through. The deeper they went, the hotter it got. The air grew thick with sulfur, burning his throat. At the bottom of the stairs was a short corridor ending in another door—this one thick wood, carved with spiraling High Valyrian runes that twisted inward like flames.
Melisandre pushed it open. The room beyond was circular and small, smaller than his own bedchamber. In the center sat a low stone altar, knee-high, with a hollow carved into the top shaped like a curled human figure—head, shoulders, torso, legs—fetal, unborn. Thick black candles ringed the altar, each as wide as a man's arm, red wicks burning perfectly steady, not flickering once.
Wall niches held the tools: urns of ash, glass bottles, iron boxes. One niche held an iron chain with an empty cage dangling from it. Deep claw marks scored the bottom bars, like something had fought desperately to get out.
Limpick stopped in the doorway. He didn't step inside. His feet felt nailed to the floor—not from fear, but from cold. Not skin-deep cold. Bone-deep. It started at his spine and sank downward, pulling the heat out of him.
Melisandre stood by the altar and turned to face him. Candlelight from below carved sharp shadows under her cheekbones and into her eye sockets. Only her eyes stayed bright—red, the exact color of the candle wicks.
"You feel it," she said. "The power here. Most people only feel cold and don't know why. Can you tell where it's coming from?"
Limpick stayed in the doorway. He closed his eyes and let the cold pull at him. It came from beneath the altar—from under the floor, from deeper still, from the bones of the mountain itself. Something down there was waiting, curled and sleeping but ready to wake. He opened his eyes. "From below. Very deep."
Melisandre's mouth curved the smallest fraction. "Yes. This castle sits on a volcano. Fire lives inside the mountain, but not all fire is the same. Some fire gives warmth, light, life. Some fire gives darkness, death—" She held her hand above the altar without touching it. Her fingertips flushed red, as if something underneath was heating them. "Power."
She pulled her hand back, turned to the niches, and took out a dark-brown glass bottle. Then a small iron box the size of a man's palm, covered in the same spiraling runes as the door. She set both on the altar. From inside her robe she drew a small knife—dragonglass blade, black and half-transparent, catching dark-red light from the candles.
"Do you know what a shadow is?" she asked without turning.
"Something that appears when light hits an object and gets blocked."
"That is the ordinary kind." She laid the knife on the altar. "I mean another kind. Living shadows. Shadows with will, shape, and power. The stronger the light, the darker the shadow. R'hllor is the strongest light in the world, so the shadows he casts are the strongest of all. They can kill. They can pass through walls. They can cross a thousand miles and take a life."
Limpick's fingers tightened on the doorframe. He suddenly understood what this room was—not a prayer chamber, not a meditation room. It was a workshop. Melisandre's workshop. What she made here wasn't holy bread or holy water. It was shadows. Killing shadows.
Melisandre opened the iron box. Inside, on black velvet, lay a single short, curly hair—like an animal's. She set the box down, then poured a thick black liquid from the glass bottle into the altar's hollow. It flowed like blood but darker, filling the carved channels and gathering at the center.
"These are the materials for a shadow assassin," she said, voice flat, like she was explaining how to bake bread. "A man's hair, an infant's umbilical blood, black oil from deep beneath Dragonstone. Mixed at the right time—when the moon is in the proper phase, the tide at the right height, the flames the right color—then lit with R'hllor's holy fire. But one thing is still missing. The most important part. Not a material. Fuel."
She turned to face him. Candlelight from below left her face in shadow. Only her eyes remained bright—deep red, bottomless.
"Life," she said. "Creating a shadow assassin requires life. Not just any life. The life of someone with royal blood—king's blood, dragon blood, blood that can resist magic. Targaryen blood."
Limpick's fingers dug harder into the doorframe. He stayed silent, waiting.
"Lord Stannis carries that blood," she continued. "His great-grandmother was a Targaryen princess. Dragon blood runs in his veins. I use his life to make the shadows—not all of it, only a piece each time. Every shadow I create drains a little of his life. His body ages. His soul darkens. He knows. He agreed. For the throne, for the Lord of Light, for the Long Night that is coming, he is willing."
She turned her palm up. Blood—black in the candlelight—dripped steadily into the hollow. The black oil and blood mixed, smoking. Thin white smoke rose straight up, gathered against the ceiling, and formed a slow-spinning circle of mist.
"But it doesn't always succeed," she said. "The shadow assassin must be cast close to the target. Not across a sea, not across mountains. It has to be done where the target's scent and warmth still linger. If it works, the target dies in his sleep—throat cut by an invisible blade, no wound anyone can trace, no killer anyone can find. If it fails—" The dark-red glow at the center of the mist flickered and died. The mist dissolved into ordinary white vapor and drifted out through the cracks around the door.
"If it fails, the life is wasted. Stannis grows older for nothing."
She examined her palm. The cut had already sealed, edges blackened as if cauterized. She wiped the blood away with a cloth, then turned fully toward Limpick.
"Do you know why I'm telling you this?"
Limpick shook his head.
"Because you were chosen by fire. You see the color of flame. You see the blue fire. You see the paths inside it. That means you have the potential—not now, but someday. In a few years, a few decades, maybe longer. When your fire burns strong enough and your body can carry it, you will be able to do this too. Not with another man's life. With your own. A priest of the Lord of Light does more than recite scripture and lead prayers. We have a higher duty—to fight darkness with darkness, to kill shadows with shadows."
She stepped close. Very close. She reached out and pressed two fingertips to his chest—exactly over his heart, over the seven pieces of dragonglass and the dragon bone hidden beneath his robe. Her fingertips were cold. Ice-cold. The contrast jolted him. She had always been burning hot. Today her touch was freezing.