The black fletching vibrated with a high-pitched hum. A single drop of viscous, dark liquid ran down the wood, smoking as it dissolved the expensive varnish.

The scent of acrid chemicals and burnt sugar filled the small gap between the library and the balcony.

Lucien did not shout.

He moved with a silent, lethal grace that bypassed panic. His hand caught Lyra's upper arm, pulling her back into the library's shadow.

He looked at the treeline. His silver-inlaid blade was out, a thin, glittering line of steel in the grey morning light.

"Darius does not send scouts anymore," Lucien said. His voice was a flat baritone, devoid of emotion. "He sends the Iron-Rot."

Four figures detached from the mist. They did not wear the ragged furs of the northern rogues. They were draped in charcoal-colored tactical gear, their faces obscured by matte black masks. They did not growl or bark. They moved with the synchronized, rhythmic gait of professional killers. One carried a recurve bow; the others held long, hooked blades designed to catch on bone and tear muscle.

The archer notched a second arrow.

Lyra stood her ground. The silver in her marrow hummed, a low-frequency vibration that made her skin prickle. Her fingernails sharpened into points. Her pupils expanded, the molten silver consuming the amber until her gaze mirrored the moon. She did not wait for a command. She opened her hands.

A pulse of silver energy moved from her palms. It hit the balustrade, throwing a cloud of granite dust into the air, but the assassins did not flinch. They split their formation.

From the direction of the medical pavilion, a shadow broke through the trees. It was not elegant. It was a wreck of a man, bare-chested and drenched in the sweat of a fever that hadn't fully broken. Cassian Ashveil did not have a sword. He did not have a cloak. He held a length of iron piping he had ripped from the pavilion's cooling system.

"Lyra!"

The name was a jagged, raw sound that tore through the quiet of the garden. Cassian lunged. He covered the twenty yards of gravel in a blur of gray motion. He did not go for the blade-wielders. He went for the archer.

The second arrow left the string. It was aimed at Lyra's throat.

Cassian did not shift his form. He did not have the time. He threw his body into the air, twisting to intercept the projectile. The sound of the impact was a wet, heavy thud followed by the crack of the shaft breaking. The arrow buried itself deep in his upper chest, the tip protruding from the back of his shoulder.

He hit the ground, rolled, and was on his feet. He slammed the iron pipe into the archer's mask. The sound of bone breaking was a hollow snap.

The two blade-wielders turned on him. They moved in a pincer.

Lucien jumped from the balcony. He did not land hard; he rolled and came up behind the first assassin. His blade moved in a horizontal arc. A thin red line appeared on the man's throat. Lucien did not watch him fall. He turned his attention to the second.

Cassian was struggling. The poison on the arrow—the Iron-Rot—was already moving. Dark, violet veins began to crawl up his neck, mapping the network of his blood vessels. He swung the iron pipe with a frantic, uncoordinated strength. He took a hooked blade to the ribs to keep the distance between the killer and the stairs leading to Lyra.

Lyra moved down the stairs. Her bare feet hit the gravel. The silver light on her skin was a constant, shimmering heat that turned the mist to steam.

The final assassin moved for her. He was fast. He ducked under Lucien's strike and lunged for Lyra's midsection.

Cassian lunged from the side. He did not use the pipe. He used his bare hands. He caught the assassin's hooked blade by the steel. The edge sliced through his palm, blood spraying onto the grass, but he did not let go. He pulled the man toward him and drove his forehead into the mask.

The impact sounded like a cannon blast. The assassin went limp.

Cassian stayed on his knees. He reached for the arrow in his chest and snapped the fletching with a grunt. He dropped the pieces into the mud.

The garden went silent. The mist began to thin as the sun touched the horizon.

Lucien stood ten feet away. He adjusted his charcoal waistcoat. His shirt was spotless, save for a single drop of blood on his cuff. He looked at Cassian, then at Lyra.

Cassian turned toward Lyra. His face was a mask of grey skin and sweat. The violet veins had reached his jawline. His storm-gray eyes were wide and bloodshot, scanning her for a wound.

"Are you... hurt?" Cassian gasped. His voice was a wet rattle.

"No," Lyra said. Her voice was a chime of silver.

She walked to him. She did not look at Lucien. She did not look at the bodies. She looked at the blood pumping from Cassian's chest.

Cassian's strength failed. His shoulders hunched. He leaned forward, his forehead hitting the wet moss.

Lyra caught him.

The weight of him was immense. She lowered him to the ground, his head resting in the crook of her arm.

"Cassian," she said. Her hands were flat against his chest. She felt the erratic, frantic thud of his heart through her palms.

"I'm... here," he whispered. He reached up. His fingers were stained with his own blood. He touched the hem of her black shift. He did not grab it. He simply brushed the fabric. "Stay... silver."

His eyes rolled back. His hand dropped to the gravel.

Lyra's breath came in jagged gasps. She pressed her palms into the wound in his chest. The silver energy in her marrow flared. It moved from her hands into his skin, a shimmering, frantic pulse. She did not speak. She did not pray. She stared at the violet veins on his neck, her teeth gritted.

"Lucien," she said. The name was a command.

Lucien knelt on the other side of Cassian. He looked at the entry wound. He reached out and touched the side of Cassian's neck.

"The Rot has reached the core," Lucien said. 

Lucien stood and barked a command to the southern guards arriving from the perimeter. "Medical pavilion. Now. Double the silver-salve dosage. He is not to die on this soil."

The guards moved Cassian onto a stretcher. 

Lyra stood up. The front of her black silk shift was soaked through with red. The blood was warm against her skin. She watched the guards carry him away toward the stone building near the ridge.

The garden was a wreck of broken stone and dead men.

Lucien walked to her. He did not offer a hand. He stood beside her, his shadow overlapping hers on the gravel.

"He used himself as a shield," Lucien said.

"I know," Lyra replied, 

looked at her hands. The blood was starting to dry into a dark, matte finish.