“You should have forseen this, whelp,” said Iarlath, but his gaze wasn’t on Kieran—it was on Mark, hungry, full of appetite, as if the thought of a whipping drew him like the thought of food. Mark reached out toward the tree—

Julian stepped forward. “Whip me instead,” he said.

For a moment everyone froze. Emma felt as if a baseball bat had slammed into her chest. “No,” she tried to say, but the word wouldn’t come.

Mark whirled around to face his brother. “You can’t,” he said. “Mine is the crime. Mine must be the punishment.”

Julian stepped past Mark, almost pushing him aside in his determination to present himself in front of Gwyn. He stood with his back straight and chin up. “In a faerie battle, one can pick a champion to represent them,” he said. “If I could stand in for my brother in a fight, why not now?”

“Because I’m the one who broke the law!” Mark looked desperate.

“My brother was taken at the beginning of the Dark War,” Julian said. “He never fought in the battle. His hands are clean of faerie blood. Whereas I was in Alicante. I killed Fair Folk.”

“He’s goading you,” Mark said. “He doesn’t mean it—”

“I do mean it,” said Julian. “It is the truth.”

“If someone volunteers to take the place of a condemned man, we cannot gainsay it.” Gwyn’s look was troubled. “Are you sure, Julian Blackthorn? This is not your punishment to take.”

Julian inclined his head. “I’m sure.”

“Let him take the whipping,” Kieran said. “He wants it. Let him have it.”

After that, things happened very quickly. Mark threw himself at Kieran, his expression murderous. He was shouting as he dug his fingers into the front of Kieran’s shirt. Emma moved forward and was knocked back by Gwyn, who moved to pull Kieran and Mark apart, pushing Mark brutally aside.

“Bastard,” Mark said. His mouth was bleeding. He spit at Kieran’s feet. “You arrogant—”

“Enough, Mark,” snapped Gwyn. “Kieran is a prince of the Unseelie Court.”

“He is my enemy,” said Mark. “Now and forevermore, my enemy.” He raised a hand as if to strike Kieran; Kieran didn’t move, just looked at him with shattered eyes. Mark lowered his hand and turned away, as if he couldn’t bear to look at Kieran any longer. “Jules,” he said instead. “Julian, please, don’t do this. Let me.”

Julian gave his brother a slow, sweet smile. In that smile was all the love and wonder of the little boy who’d lost his brother and against all odds, gotten him back. “It can’t be you, Mark—”

“Take him,” Iarlath said to Gwyn, and Gwyn, reluctance written all over his face, stepped forward and caught hold of Mark, pulling him away from Julian. Mark struggled, but Gwyn was a massive man with enormous arms. He held tightly to Mark, his expression impassive, as Julian reached down and pulled off his jacket, and then his shirt.

In the bright daylight his skin, lightly tanned but paler over his back and chest, looked vulnerable and exposed. His hair was ruffled all over from the collar of the shirt, and as he dropped it on the ground he looked at Emma.

His look broke through the icy vise of shock that gripped her. “Julian.” Her voice shook. “You can’t do this.” She moved forward and found Iarlath blocking her way.

“Stay,” Iarlath hissed. He stepped away from Emma, who went to go after him and found her legs pinned in place. She couldn’t move. The buzz of enchantment prickled along her legs and spine, holding her as firmly in place as a bear trap. She tried to wrench herself forward and had to bite back a shriek of pain as the faerie magic clamped and tore at her skin.

Julian took a step forward and put his hands against the tree, bending his head. The long line of his spine was incongruously beautiful to Emma. It looked like the arch of a wave, just before it crashed. White scars and black Marks patterned his back like a child’s illustration drawn in skin and blood.

“Let me go!” Mark shouted, twisting in Gwyn’s grasp.

It was like a nightmare, Emma thought, one of those dreams where you were running and running and never getting anywhere, except now it was real. She was struggling to move her arms and legs against the invisible force that kept her pinned like a butterfly to a board.

Iarlath strode toward Julian. Something flashed in his hand, something long and thin and silver. As it flicked forward, tasting the air, Emma saw he was clutching the black handle of a silver whip. He drew his arm back.

“Foolish Shadowhunters,” he said. “Too naive to even know who you can trust.”

The whip came down. Emma saw it bite into Julian’s skin, saw the blood, saw him arch back, his body bowing.

Pain exploded inside her. It was as if a bar of fire had been laid across her back. She flinched, tasting blood inside her mouth.

“Stop it!” Mark yelled. “Can’t you see you’re hurting them both? That’s not the punishment! Let me go, I don’t have a parabatai, let me go, whip me instead—”

His words ran together inside Emma’s head. Pain was still throbbing through her body.

Gwyn, Iarlath, and Kieran were looking from her to Julian. There was a long, bloody welt along Julian’s back, and he was clutching the trunk of the tree. Sweat darkened his hairline.