The flagstones in this corridor were laid by a goblin with a grudge against straight lines. Or a drunkard. Probably a drunkard goblin, then. I tapped my back molars together twice—once for the wobble in the stone under my right heel, once for the sheer bloody-mindedness of whoever decided this level of unevenness was acceptable. My own work—the intricate, ink-spelled diagrams of Hogwarts’ shifting architecture—was about precision. This floor was an insult.
My official title was Consulting Magical Surveyor. A fancy name for the person hired to map the castle’s post-war structural anomalies before the Ministry would sign off on the final round of reconstruction grants. Most of it was grunt work: charting corridors that had sealed themselves, staircases that now led to solid walls, and classrooms whose dimensions changed depending on the phase of the moon. Tedious, but necessary.
Today’s task was the fourth-floor corridor connecting the hospital wing to the Grand Staircase. Easy. Except for the pull.
It wasn’t sound or light. It was a vibration, a pure A-sharp note resonating in the bones of my skull, felt more than heard. A magical signature, but one that was off-key, discordant. Like a tuning fork struck against cotton wool. It tugged. Gently, at first. I tried to ignore it, focusing on the flick and swish of my calibrated quill as it sketched the archway ahead. But the pull intensified, a physical thing now, a hook baited with curiosity and lodged somewhere behind my navel.
I sighed, capping my inkpot. The official schematics, provided by a flustered and overworked Minerva McGonagall, showed this corridor as a simple, unbranching passage. They were wrong. About twenty paces down, half-hidden by a tapestry depicting a particularly dim-witted knight arguing with a gnome, was a narrow, unlit opening. The air spilling from it was cold, carrying the scent of deep dust and ozone. The pull was coming from inside.
This wasn’t on the plan. Reporting it was the proper procedure. I should have gone straight to the Headmistress.
I tapped my teeth together. Three times, sharp.
Then I slipped through the opening.
The passage behind the tapestry was tight, the stone raw and unfinished. My boots crunched on grit and what might have been bone fragments. Animal, I hoped. The magical resonance grew stronger with every step, the discordant note fraying into a harmony of static and pain. It led me to a small, circular chamber I’d bet my entire Curse-Breaker’s kit didn’t exist on any map of this castle, magical or otherwise.
It was a dead end. The only thing in the room was a heavy, ornate brass astrolabe resting on a stone pedestal in the centre. It was a beautiful, complex thing of interlocking rings and delicately etched constellations, all oriented around a central crystal the size of my fist. And it was broken.
A fine, spidery crack ran through the crystal heart. Dust coated the brass rings so thickly it obscured the fine silver inlay of the runes carved into their surfaces. The magic emanating from it felt like a scream held back for a very long time. It was wrong. All wrong.
This explained the anomalies. A damaged artefact of this potential power, bleeding raw, unstable magic into the castle’s ancient wards, would absolutely cause architectural chaos. A staircase deciding to lead nowhere would be the least of it.
I took a step closer. The pull ceased, replaced by a low, ambient thrum that vibrated up through the soles of my boots. I could feel the magic now, brushing against my senses. It was old. Very old. And it was failing.
On my own initiative, I drew my wand. Protocol could go hang. A simple diagnostic charm first. “*Speculum revelo.*”
The spell fizzled a foot from the astrolabe, dissolving into harmless green sparks. Odd. That shouldn’t happen. My diagnostics were top-of-the-line, tweaked for exactly this kind of arcane interference. I tried a basic repair charm, knowing it would likely fail but needing to see *how* it failed. “*Reparo.*”
Nothing. Not a spark, not a flicker. The spell was simply… swallowed. Absorbed into the oppressive silence of the device. This wasn't just broken; it was magically exhausted, yet paradoxically, it was also defending itself.
I holstered my wand. Gloves. I pulled on a pair of dragon-hide gauntlets from my satchel, the leather cool and familiar. You don’t touch an unknown, damaged artefact with your bare skin unless you’re actively courting a hex that will make your ears grow cabbages.
My gloved fingers brushed against one of the dusty brass rings.
The world vanished in a flash of white light and the deafening roar of a thousand breaking things. An image burned itself onto the inside of my eyelids: a sky filled with unfamiliar stars, wheeling in nauseating, impossible patterns. It wasn't a vision. It felt like a memory. A memory of a place that wasn't here, a time that wasn't now. The smell of ozone was so strong it burned my throat.
Just as quickly as it came, it was gone.
I stumbled back, gasping, my heart hammering against my ribs. The room was the same. The dust, the cold, the silence. My hand was still outstretched. But the astrolabe… it had changed.
The dust on the rings was gone, disturbed not by my touch, but from within. The fine silver lines of the runes glowed with a faint, pulsing blue light. They were no longer obscured. And they were no longer the runes I had glimpsed moments before.
Where there had been a familiar inscription for celestial navigation—Algiz, Sowilo, Raido—there was now a sequence I had never seen. It was elegant, barbed, and utterly alien.
“What. Are you doing.”
The voice was a low, silken drawl that cut through the silence like a shard of obsidian. It came from the shadows of the narrow passage I’d entered through.
I didn't need to turn. I knew that voice. Every member of the Order who had survived the final battle knew that voice, though few had heard it since. It was the sound of potions fumes, quiet fury, and secrets kept at terrible cost.
Severus Snape stepped out of the darkness. He wasn't wearing his heavy teaching robes, but a simple black frock coat that somehow made him seem more dangerous, less a caricature. His face was pale, his expression unreadable, but his black eyes were fixed on the glowing object in the centre of the room, and then, with dreadful weight, on me.
My hand, still in its gauntlet, was resting on the brass ring. I snatched it back as if burned.
He took another slow step into the room, his gaze flicking from my face to the astrolabe, then back. He wasn’t looking at me like a misbehaving student. He was looking at me like I was a lit fuse.
My eyes darted down to the astrolabe again, a frantic, desperate need to understand seizing me. The impossible runes still pulsed with that cold, blue light. They hadn’t been there a minute ago. I was sure of it. I had to be.