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Alec had never imagined that Magnus would be the one to leave him.
Not like this.
Not first.
He was the mortal one, after all; the one with time always breathing down his neck like a shadow, always chasing, always closing in. Magnus had seen centuries. Endured them. Would live for many more. Or so Alec had believed.
But then came the day that changed everything.
It didn't happen in battle. Not during some perilous mission or while facing down yet another looming threat. It was a morning like any other. Ordinary. The sun hung pale and milky behind the kitchen windows, casting a soft glow on the countertops. Magnus was humming quietly, absentmindedly, as he sliced apples for breakfast, a moment steeped in that delicate, silent intimacy that only long love can weave.
Then, without warning, it happened.
The knife slipped from his fingers, clattering onto the tiles with a sharp metallic ring. And Magnus collapsed.
He crumpled like a silk shirt slipping from its hanger, folding in on himself with no cry, no warning. His magic burst outward in a wild, flickering current; light and sound crashing against the walls, vibrating through the room.
And then—silence. Complete. Final.
Alec's voice tore through it.
"Magnus!"
The chair scraped harshly against the floor as he shoved it back, stumbling toward him.
He dropped to his knees, yanked Magnus into his arms, and shook him; once, twice, again, as though sheer desperation might be enough to tether him to this world.
"Open your eyes, Magnus. Please. Wake up!"
His voice cracked, collapsed, and bled into the still air like water seeping into cold stone.
Seconds passed. Minutes, maybe. Each one an eternity. Then, slowly, painfully, Magnus opened his eyes.
But Alec knew instantly. Something was wrong. There was something missing in his gaze. Something quieted. Extinguished. Like the moment after a star burns out—when the light is gone, but the emptiness remains. As if someone had erased the universe from his eyes. Cat confirmed it hours later, though Alec had already known.
"His magical core is collapsing," she said softly. Her voice was barely more than a breath, but it sliced through the room like shattered glass.
She rubbed her arms with trembling hands, as though trying to shield herself from a chill that came from somewhere deeper than skin.
"When his magic goes, it takes everything with it. His life force is... tied to it."
Alec sat hunched forward on the edge of the couch, elbows braced on his knees, hands clenched so tightly together it looked like he was trying to physically hold on to something, to keep it from slipping through his fingers.
His eyes never left the bed.
Magnus lay still. Peaceful. As if nothing had happened. As if he might stir at any moment, murmur something teasing about the crumpled blanket, offer that tired, knowing smile. But Alec knew better.
"So that means..." he began, voice a rasp.
Cat nodded, her lips trembling.
"Yes," she whispered. "He's going to die."
Five words. Plain. Irrevocable. They struck Alec like a blade.
Magnus—immortal, eternal, unshakeable—couldn't just... fade.
Not him.
Not like this.
"We call it magical degeneration," Cat continued, voice straining for composure. "A disease that comes silently. Eats you from the inside. Merciless. We don't know where it originates. Maybe it's the cost. For too many years. For too much power, used too often. For something no one was ever meant to have."
Alec lifted his head, eyes burning. His voice came out hoarse, raw.
"Is there... anything? A cure? A spell?"
Cat shook her head slowly. Tears shimmered in her eyes now, unhidden.
"No," she said. "There's no cure. No saving him. No miracle."
"How long?"
She looked down.
"A few weeks. Maybe months. No more."
Alec said nothing. Didn't argue. Didn't plead.
He stood, slow and unsteady, as though the weight of grief had begun to hollow out his bones, and left the room.
The moment the bathroom door closed behind him, he doubled over the toilet and vomited. Then he slid down onto the cold tile floor, curling into himself like something shattered.
And he wept.
At first, it was silent.
Then not.
Somewhere between the sobs, a memory surfaced; Magnus brushing his hair, laughing at how it tangled behind his ears.
"Alec, this mop is a rebellion," he'd said.
And Alec had rolled his eyes, trying not to smile.
The memory made the sob sharper, not softer.
Eventually, he returned to the bedroom.
Magnus was awake. Cat was gone. Alec paused in the doorway, frozen. Magnus smiled. Gently. Sadly. But the smile didn't touch his eyes.
"I wanted to tell you sooner," he said softly. "But I was afraid... that saying it would make it real."
Alec sank to his knees beside the bed. He wrapped his arms around Magnus and pressed his face into his stomach, holding him with a desperation that went beyond reason, as if love alone could become an anchor strong enough to stop what was coming. His tears soaked the golden blanket, vanishing into the fabric like lost hopes into sand.
"I can't do this," Alec whispered. "I can't live without you."
"You can."
"I don't want to."
Magnus reached out with a trembling hand, brushing Alec's hair back in a touch so gentle, it barely stirred the air between them.
"But you will, Alexander," he said. "Even if my body leaves... my love stays. Love doesn't die. Not like that."
***
The fire had long since shrunk to flickering embers, casting a soft, orange glow across the walls. Outside, the world lay silent beneath a blanket of snow. Inside, the silence was heavy, broken only by the rustling of turning pages.
Alec sat cross-legged on the floor of Magnus' study, surrounded by open books, parchments, and ancient journals written in half a dozen languages. His hands trembled as he turned the brittle pages. His eyes were red, his face taut with strain.
He was searching.
Desperately.
For something.
A cure. A spell. A loophole in fate. Some long-forgotten fragment of magic that Magnus might have overlooked or cast aside in resignation. Anything that could change everything.
A soft voice drifted in from the bedroom.
"Alexander..."
Magnus stood in the doorway, leaning against the frame. His silhouette had grown thinner. The shadows beneath his eyes looked carved into his skin.
"You should be sleeping," he said gently.
"I can't," Alec replied. "There has to be something here. You've read more than anyone. Lived longer than anyone. Maybe you missed something... maybe I'll find it."
Magnus stepped slowly into the room, his fingers trailing along the spines of books he'd pulled from the shelves.
"I didn't miss anything," he said quietly. "And you won't either. Because there's nothing to find."
Alec fought back tears he refused to shed.
"Don't say that."
"I've lost three friends to this disease," Magnus said, his voice rough. "And every time, I scoured every book. Searched through every dimension. Chased down every whisper, no matter how old or faint. I begged angels. I bargained with demons. And still..."
He knelt in front of Alec, cupping his cheek with a tender hand.
"I know what desperation feels like. But this isn't something you can fight with willpower. Not even with love."
"But I have to try," Alec said, his voice breaking. "I can't just stand by—"
Magnus pulled him into his arms, pressing his forehead against Alec's.
"You don't have to stand by," he whispered. "You just have to be here."
Silence filled the space between them, thick with unspoken pain. Alec's shoulders shook as he clung to Magnus, as if he could hold back the inevitable just by holding him tightly enough. But death—like time—listened to no one.
"Come to bed," Magnus murmured.
"Give me your warmth... while I can still feel it."
Alec nodded, defeated. He left the books behind; a battlefield of knowledge with no weapons for this war. And together, they returned to bed, where Alec wrapped himself around the man he loved more than anything in the world.
***
It had been three weeks since Magnus had collapsed. Three weeks, in which he had faded a little more with each passing day. With every sunrise, he lost a fragment of his light, his presence, the once-unshakable brilliance that had defined him.
Now he lay curled beneath a thick wool blanket, its scent—clove, cedar, and the faint trace of sandalwood—reminding Alec of the home he had found in Magnus. The once-blazing magic that had coursed through Magnus' very being now flickered faintly beneath his skin, little more than the memory of what once was. His cat-like eyes—once molten gold, alive and knowing—now shimmered only faintly, like the last embers of a dying fire.
Alec sat at the window, chin resting in his hand. Outside, the snow danced in slow spirals, as if even time itself had fallen into mourning. He hadn't slept properly in days. How could he, when any moment could be the last?
A quiet breath.
A whispered word in the night.
A fleeting smile in the morning—each had become precious, sacred, irreplaceable.
"Come here," Magnus whispered. His voice was barely more than a breath, fragile, like parchment in the wind.
Alec rose instantly, without hesitation. He knelt beside Magnus, reaching for his hand and lacing their fingers together. The skin beneath his touch was cool, the bones beneath as delicate as winter branches.
Magnus smiled faintly, lips pale, eyes weary.
"Lie with me," he asked.
Alec obeyed. Gently, he lay beside him, careful, as if a single careless movement might shatter Magnus into pieces. He leaned forward, resting his forehead against Magnus', closed his eyes, and matched his breathing to the slow rhythm of the man beside him.
A silence settled over them, not empty, but full. Full of nearness. Of everything that never needed to be said between them. Minutes passed. Time began to lose its meaning.
Alec kept his eyes shut, fighting the tears that pressed hard behind his lids like a rising tide. He only allowed himself to cry when Magnus was asleep. And yet—somehow, Magnus always knew when Alec was about to break.
"I'm still here," Magnus whispered.
Alec pressed his eyes shut even tighter.
"But not for much longer," he answered softly, barely audible.
Magnus lifted a hand, touched Alec's face with his fingertips; so delicately, as if he were caressing the wing of a dream. Then he leaned forward and kissed him; a kiss as fleeting as the flutter of butterfly wings.
Alec opened his eyes. A single tear escaped, falling onto the pillow between them. Magnus saw it. And smiled.
"But I'm here now," he said. "And that's what matters."
***
One evening, Magnus asked Alec to go outside with him.
"I want to see New York at night one more time."
Alec didn't argue. He wrapped Magnus in the warmest coat he could find and carried him up to the rooftop of the loft.
The city lay quiet beneath them, lights sparkling in the distance. A cold wind swept across the rooftops, but Magnus didn't mind. On the contrary—it meant he was still alive.
Alec sat behind him, arms wrapped gently around his waist. Magnus leaned into him, as if he belonged there. The warmth of Alec's body seeped through the layers of clothing, driving away the chill. Magnus no longer had the strength to cast even the simplest spell.
"I always thought I'd live forever," he murmured into the silence of the night.
"I thought that too," Alec replied just as softly. There was pain in his voice, subtle but there, as if he was trying to hide it from Magnus.
Magnus swallowed hard against the tightness in his throat.
"But maybe that's the trick," he continued, voice trembling. "Maybe forever just means... how long someone remembers you. How long someone loves you."
"You'll have forever," Alec said. It was clear he was fighting back tears. "I promise you that."
Magnus turned his head and pressed his forehead to Alec's neck, right where his rune was burned into his skin.
"I already do."
***
The rain fell like a quiet lullaby against the windows; a rhythmic whisper from the world outside. As so often before, they lay facing each other, forehead to forehead, knees touching—softly, like a memory you can't let go of.
Alec brushed his thumb over Magnus' cheek; a tender gesture, as if trying to memorize every line, every trace of this face and keep it for the after, the one he couldn't bear to imagine.
"Do you remember Paris?" Magnus asked. His voice was barely a breath, lost between the rain and the ticking of the clock on the nightstand.
"You wore red velvet," Alec said quietly. "And kissed me at the foot of the Eiffel Tower."
Magnus' lips curled into a faint smile.
"And you looked at me like I meant the world," he whispered.
Alec closed his eyes, letting the memory wash through him like warm light falling through a stained-glass window.
"Because you did," he said. "Because you do."
Magnus exhaled softly. "If you ever stop believing that, I'll haunt you."
Alec huffed a sound that could have been a laugh or a sob. "Noted."
For a moment, silence returned. Only the rain kept speaking.
Magnus' smile broke apart into sadness.
"I'm sorry."
Alec kissed his temple.
"You don't need to be."
"I wanted more time," Magnus said. His voice trembled. "I wanted to see your hair turn gray. I wanted to argue with you about sofas. I wanted to..."
He trailed off, swallowing hard.
"I wanted to grow old with you."
Something in Alec's chest twisted painfully. The words caught in his throat, burned, refused to take shape. So he just held him tighter. Promised, in the silence, what words could never carry.
"I love you," Magnus whispered.
His breath grew shallower, lighter. His fingers twitched faintly in Alec's hand, like a last attempt to hold on to this world. A final flicker of his magic.
Alec gripped them tighter.
"I'm not ready," he said. His voice cracked. "Magnus, please..."
"You were the best thing that ever happened to me," Magnus breathed.
"Don't go. Please—don't leave me..."
But Magnus' eyes closed. His last breath wasn't a word, but a sigh... gentle, final, like the wind blowing out a flame.
Alec screamed. A sound, raw and sharp as shattering glass, tore through the night. He shook Magnus' body, called his name, pleaded, begged. Tears fell, unstoppable, hot, until his throat was raw from sobbing. Then he crawled under the blanket beside him, closed his eyes, pressed himself close, as if sheer nearness could bring him back.
"I love you too," he whispered, again and again, like a prayer or perhaps only the shadow of a prayer no one would ever hear.
And when the sun rose, Alec was still lying there. Unmoving. Holding. Left behind.
***
The hall of the New York Institute had never been so silent. The great doors stood open, and golden sunlight streamed through the stained-glass high above the gathered crowd. It broke into shadows and colour; vivid patterns spilling across the faces of the mourners like whispered memories.
Warlocks. Shadowhunters. Downworlders. Family. Friends. The kind of people only someone like Magnus Bane could unite... even in death.
In the centre of the room stood the coffin, resting within a circle of shimmering runes, burned in silver into the floor; ancient symbols of release and protection. Flames danced atop the pillars, not red, not gold, but that deep blue and violet hue that had always carried Magnus' magic. The air was heavy with incense and whispering enchantments, drifting like a distant choir through the room.
Behind the coffin stood a Memory Mirror: a glass surface woven with spells. Light-images shimmered within fleeting, living moments: Magnus laughing. Magnus fighting. Magnus loving.
Alec stepped forward. His parabatai rune pulsed, as if it had only just been burned into his skin. Jace's quiet gesture wasn't loud, but it said everything: I'm here. You're not alone.
Alec hadn't prepared a speech. How do you fit an entire universe into a few words? So he spoke what his broken heart whispered.
"I thought we had more time." The magic in the room stilled, as if even it paused to listen. "I thought we'd have a quiet life someday. I thought we'd argue about curtains, eat dinner too late, and fall asleep on the couch together, old and content. Somehow... But love isn't measured in years. It's measured in moments. And I had the best ones with you."
His voice was calm, but fissured with pain, revealing everything grief had carved into him. Alec stepped closer, placed his hand on the coffin; a gesture as if to catch one last heartbeat.
"You were everything," he said. "And you always will be."
He placed a small vial among the flowers. It was made of clear glass and filled with golden sand, glowing faintly with magic. A memory charm. Every shared moment, captured and sealed; so Magnus could take their love with him, wherever his soul might now go.
Then the Soul Spell began. An ancient song, spoken in Chthonian, filled the hall. It wasn't a melody in the usual sense; it was a pulse, a vibration in the air that touched the skin and the heart. The old warlock runes began to glow. The circle of light around the coffin slowly began to close. One by one, the flames extinguished, as if guiding the light of Magnus's soul on its journey.
Alec turned away. His family caught him, offered comfort in this unbearable moment. And deep inside, something closed within him, something he knew would never open again.
***
The loft remained untouched. The mug Magnus had last drunk from still sat on the side table. Untouched. The tea had long since evaporated, but Alec couldn't bring himself to move it. The books Magnus had wanted to read again gathered dust on the shelves. A bookmark still rested between the pages of The Master and Margarita, like a held breath. The bed was made. Smooth. Cold. Alec hadn't slept in it since that night.
The day after the funeral, he had returned to the New York Institute. Back to his family. But he never forgot the loft. He returned. Again and again. Even on that day... the anniversary of Magnus' death.
Catarina came, as she did every year, with Madzie's small hand in hers. Together, they placed a vase of white calla lilies in the tall window, where the light made the flowers seem almost translucent. Sometimes, Ragnor would appear without a word, laying a handful of forget-me-nots on the windowsill.
Alec would go up to the roof. He lit a single blue candle; the colour of Magnus' magic, of his soul. He stayed with it, silent, until the flame burned out. Then he returned to his family. To spend the rest of the day with them, the way Magnus would have wanted.
Alec went on living. He loved his family, his friends, and life itself. But he never loved again. Not like that.
Beneath his shirt, close to his heart, he wore a silver chain. On it hung two rings: his, and Magnus'. Because a love like that doesn't fade. It echoes. It remembers. It waits. And Alec knew: One day, when all the stars have fallen and time comes to a halt, he will see Magnus again. And this time, he won't let him go.