“Speaking of the Clave,” said Jace. “They’re not going to be too pleased if you toss a mundane back out into a life where everyone he knows thinks he’s a vampire. All Simon’s friends know! His family knows! His sister, his mother. They’ll tell him, even if we don’t.”

“I see.” Asmodeus looked displeased. “That does complicate things. Perhaps I should take Magnus’s immortality after all—”

“No,” Simon said. He looked shocked, sick on his feet, but his voice was determined. Asmodeus looked at him with covetous eyes.

“Simon, shut up,” Magnus said desperately. “Take me instead, Father—”

“I want the Daylighter,” said Asmodeus. “Magnus, Magnus. You’ve never quite understood what it is to be a demon, have you? To feed on pain? But what is pain? Physical torment, that’s so dull; any garden-variety demon can do that. To be an artist of pain, to create agony, to blacken the soul, to turn pure motives to filth, and love to lust and then to hate, to turn a source of joy to a source of torture, that is what we exist for!” His voice rang out. “I shall go forth into the mundane world. I will strip the memories of those close to the Daylighter. They will remember him only as mortal. They will not remember Clary at all.”

“No!” Clary shouted, and Asmodeus threw his head back and laughed, a dazzling laugh that made her remember that once he had been an angel.

“You can’t take our memories,” said Isabelle furiously. “We’re Nephilim. It would be tantamount to an attack. The Clave—”

“Your memories you may keep,” said Asmodeus. “Nothing about your remembering Simon will get me in trouble with the Clave, and besides, it will torment you, which only doubles my pleasure.” He grinned. “I shall rip a hole through the heart of your world, and when you feel it, you will think on me and remember me. Remember!” Asmodeus pulled Simon close, his hand sliding up to press against Simon’s chest, as if he could reach through his rib cage into his heart. “We begin here. Are you ready, Daylighter?”

“Stop!” Isabelle stepped forward, her whip in hand, her eyes burning. “We know your name, demon. Do you think I am afraid to slay even a Prince of Hell? I would hang your head on my wall like a trophy, and if you dare touch Simon, I will hunt you down. I will spend my life hunting you—”

Alec wrapped his arms around his sister, and held her tightly. “Isabelle,” he said quietly. “No.”

“What do you mean, no?” Clary demanded. “We can’t let this happen—Jace—”

“This is Simon’s choice.” Jace stood stock-still; he was ashy pale but unmoving. His eyes were locked on Simon’s. “We have to honor it.”

Simon looked back at Jace, and inclined his head. His gaze was moving slowly over all of them, flicking from Magnus to Alec, to Jace, to Isabelle, where it stopped and rested, and was so full of broken possibilities that Clary felt her own heart break.

And then his gaze moved to Clary, and she felt the rest of her shatter. There was so much in his expression, so many years of so much love, so many whispered secrets and promises and shared dreams. She saw him reach down, and then something bright arced through the air toward her. She reached up and caught it, reflexively. It was the golden ring Clary had given him. Her hand tightened around it, feeling the bite of metal against her palm, welcoming the pain.

“Enough,” said Asmodeus. “I hate good-byes.” And he tightened his grip on Simon. Simon gasped, his eyes flying wide open; his hand went to his chest.

“My heart—” he gasped, and Clary knew, knew from the look on his face, that it had started beating again. She blinked against her tears as a white mist exploded up around them. She heard Simon cry out in pain; her own feet moved without volition and she ran forward, only to be hurled back as if she had struck an invisible wall. Someone caught her—Jace, she thought. There were arms around her, even as the mist circled Simon and the demon like a small tornado, half-blocking them from view.

Shapes began to appear in the mist as it thickened. Clary saw herself and Simon as children, holding hands, crossing a street in Brooklyn; she had barrettes in her hair and Simon was adorably rumpled, his glasses sliding off his nose. There they were again, throwing snowballs in Prospect Park; and at Luke’s farmhouse, tanned from summer, hanging upside down from tree branches. She saw them in Java Jones, listening to Eric’s terrible poetry, and on the back of a flying motorcycle as it crashed into a parking lot, with Jace there, looking at them, his eyes squinted against the sun. And there was Simon with Isabelle, his hands curved around her face, kissing her, and she could see Isabelle as Simon saw her: fragile and strong, and so, so beautiful. And there was Valentine’s ship, Simon kneeling on Jace, blood on his mouth and shirt, and blood at Jace’s throat, and there was the cell in Idris, and Hodge’s weathered face, and Simon and Clary again, Clary etching the Mark of Cain onto his forehead. Maureen, and her blood on the floor, and her little pink hat, and the rooftop in Manhattan where Lilith had raised Sebastian, and Clary was passing him a gold ring across a table, and an Angel was rising out of a lake before him, and he was kissing Isabelle . . .

All Simon’s memories, his memories of magic, his memories of all of them, being drawn out and spun into a skein. It shimmered, as white-gold as daylight. There was a sound all around them, like a gathering storm, but Clary barely heard it. She reached her hands out, beseeching, though she didn’t know who she was begging. “Please—”

She felt Jace’s arms tighten around her, and then the edge of the storm caught her. She was lifted up, whirled away. She saw the stone room recede into the distance at a terrible speed, and the storm took her cries for Simon and turned them into a sound like the ragged tearing of wind. Jace’s hands were torn from her shoulders. She was alone in the chaos, and for a moment she thought Asmodeus had lied to them after all, that there was no gateway, and that they would float in this nothingness forever until they died.

And then the ground came up, fast. She saw the floor of the Accords Hall, hard marble veined with gold, before she hit it. The collision was hard, rattling her teeth; she rolled automatically, as she’d been taught, and came to a stop at the side of the mermaid fountain in the center of the room.

She sat up and looked around. The room was full of utterly silent, staring faces, but they didn’t matter. She wasn’t looking for strangers. She saw Jace first; he had landed in a crouch, poised to fight. She saw his shoulders relax as he looked around, realizing where they were, that they were in Idris, and the war was over. And there was Alec; he had his hand still in Magnus’s. Magnus looked sick and exhausted, but he was alive.

And there was Isabelle. She had come through the closest to Clary, only a foot or so away. She was already on her feet, her gaze scanning the room, once, twice, a desperate third time. They were all there, all of them, all except one.

She looked down at Clary; her eyes were shining with tears. “Simon’s not here,” she said. “He’s really gone.”

The silence that had held the assembly of Shadowhunters in its grip seemed to break like a wave: Suddenly there were Nephilim running toward them. Clary saw her mother and Luke, Robert and Maryse, Aline and Helen, even Emma Carstairs, moving to surround them, to embrace them and heal them and help them. Clary knew they meant well, that they were running to the rescue, but she felt no relief. Her hand tightening on the gold ring in her palm, she curled up against the floor and finally allowed herself to cry.