Nate's detection crystal shrieked from amber to black.
"We're not alone."
The shadow peeled itself from the ceiling. It had no fixed form—more a suggestion of form, an absence shaped like hunger. Tendrils of non-light spilled downward, testing the air, tasting their presence. Where the tendrils passed, the crystal walls frosted and cracked.
Hazel's protective instincts fired before her conscious mind caught up. Golden light blazed from her outstretched hands, a barrier that solidified between them and the descending dark. The shadow recoiled. Then pressed harder. The barrier bowed inward like a sail in a gale.
"It's getting bigger!"
Nate was right. Every second the shadow expanded, drawing substance from somewhere she couldn't identify. Not from the tower. Not from the realm's ambient magic. Fromthem. She felt it now—a cold suction at the edges of her thoughts, pulling at her worst scenarios. The Collector reaching the Codex. The library burning. Nate's body crumpled on stone?—
The barrier cracked.
"It feeds on fear." Her voice sounded thin. "It's using our anxiety to grow."
Behind her, something metallic sang against crystal. She turned.
Mrs. Shufflewick stood transformed. The cargo pants and bush hat had vanished. Plate armor gleamed dull silver across her shoulders and chest, fitted over chain mail that clinked with each breath. A sword—actual steel, long and heavy and real—rested in her grip with a comfort that had no business belonging to a retired librarian. Her silver bun remained perfect beneath a visored helm pushed back from her face.
Her eyes burned with someone else's fire.
"For honor!" Mrs. Shufflewick's voice dropped a full octave, resonant with centuries of battlefield conviction. "For proper library organization! Stand fast!"
She charged.
The shadow lunged to meet her and Mrs. Shufflewick's sword carved through its leading tendril with a sound like tearing silk. Dark matter scattered in ribbons. The warrior inhabiting Mrs. Shufflewick's body pivoted, struck again—a precise backhand slash that opened a seam of light through the creature's mass.
"Shield your thoughts!" the warrior-librarian roared. "It cannot consume what you do not feed it!"
Nate pulled a neutralization rod from his belt and fired a pulse of blue-white energy into the shadow's flank. The creature screamed—a sound felt in the teeth rather than heard—and whipped a tendril thick as a tree trunk directly at Hazel.
Nate shoved her sideways.
The tendril caught him across the ribs. He hit the crystal floor and slid, neutralization rod skittering from his grip. Dark frost bloomed across his jacket where the shadow had struck.
"Nate!"
The shadow swelled. Fed on her spike of terror. Her barrier shattered into gold sparks and the darkness rushed toward them both.
"I'm not afraid of it—I'm afraid of losing you!"
The words tore out of her raw and graceless. Not a confession she'd planned. Not something filtered through seventeen layers of overthinking. Just the bare, stupid, obvious truth she'd been researching her way around for weeks.
Nate pushed himself up on one elbow. Blood at the corner of his mouth. Frost crackling across his shoulder. Green eyes finding hers through the dark.
"Then don't lose me. We're stronger together."
She grabbed his hand.
The magic that erupted from their joined hands wasn't golden.
It was white. Solar white. The kind of light that existed before someone invented the word for it. It poured through every crack in the crystal tower, turned the frost to steam, and hit the shadow creature like a freight train made of sunrise.
The shadow screamed again—this time audibly, a shriek that rattled the plinth and sent the Wayfinder spinning off its silk cushion. Tendrils withered. The creature's mass contracted, pulling away from the light, folding inward on itself. For three heartbeats, Hazel thought they'd won.
Then Nate's hand went slack.
His eyes rolled back. The frost on his shoulder had spread across his chest, and where it touched skin, his veins showed black beneath the surface. His breathing hitched. Stopped. Started again in a shallow, wrong rhythm that made her stomach drop through the crystal floor.
