Chapter 15 : The Third-Floor Corridor
Ravenclaw Tower — September 20, 1991, 10:47 PM
The common room was empty.
Matt had been waiting for this since the first week — monitoring patrol schedules, tracking Filch's routes through casual observation, noting which corridors the caretaker favoured and which he skipped. Three weeks of patience. The same patience he'd used under the oak tree with Twig, the same patience that had earned Whisper's trust in the Manor kitchen. Patience was a skill, and Matt had been practising it since before this body could walk.
He slipped from his dormitory in bare feet, shoes in hand. The stone floor was freezing — September in the Scottish Highlands, and Ravenclaw Tower sat at the castle's highest point, where the cold settled into the architecture like a permanent resident. His toes went numb within ten steps.
Whisper dropped from her windowsill and fell into step beside him. Through the bond, her awareness expanded around them — a bubble of heightened perception, every creak and whisper of the castle catalogued and assessed. Her Kneazle senses were better than any detection spell: footsteps at sixty metres, scent profiles of every living thing within a floor, and the uncanny ability to know when a cat — specifically Mrs. Norris — was within range.
In his hair, Twig clung tight. The Bowtruckle's bark-fingers worked the strands with anxious energy. He didn't like the dark. He didn't like the castle at night, when the paintings whispered and the suits of armour shifted and the staircases rearranged themselves with the malicious creativity of furniture that resented being walked on.
"Easy," Matt murmured. "Quick trip. In and out."
The common room's eagle knocker was silent from inside — it only challenged people entering, not leaving. Matt eased the door shut, pulled on his shoes, and started down the spiral staircase.
The castle at night was a different creature than the castle by day. Torches burned low in wall sconces, casting pools of amber light between stretches of absolute black. Portraits slept in their frames — snoring, mumbling, occasionally rolling over. The architecture breathed: subtle contractions of stone, the settling of a thousand-year-old structure adjusting to the temperature drop, a living building dreaming.
Creature Sense was active. Matt kept it at maximum range — ten metres, a sphere of awareness that catalogued every magical signature within reach. Castle rats scurried in the walls. An owl passed overhead, visible through a corridor window. Something large and sluggish moved in the lake below, too deep and distant to identify.
He descended four floors in eight minutes. Whisper scouted each corridor before Matt entered — a grey shadow checking corners, pausing, signalling all-clear through the bond with a pulse of safe-move-now. Their communication had refined over two years into something approaching language: emotions layered with directional awareness, threat assessments delivered in the time it took to blink.
The third-floor corridor was roped off.
Not elaborately — a brass chain across the entrance, a sign that read CORRIDOR CLOSED — NO STUDENTS BEYOND THIS POINT, and the lingering trace of a basic ward that would alert the caster if physically crossed. Matt didn't need to cross it.
He stood at the chain's edge, pressed his back against the wall, and pushed Creature Sense outward.
The system responded.
[CREATURE DETECTED: CERBERUS (DOMESTICATED)]
[SPECIES: THREE-HEADED DOG. TIER 3. LEGENDARY RARITY.]
[STATUS: HEALTHY. ALERT. GUARDING.]
[DANGER LEVEL: EXTREME — IMMEDIATE FATALITY RISK FOR HOST AT CURRENT LEVEL.]
[BOND STATUS: BONDED TO ANOTHER (RUBEUS HAGRID). COMPATIBILITY: 12%.]
Matt's breath caught.
The signature was enormous. At this range — six, maybe seven metres through a stone wall — Fluffy registered like a bonfire in Creature Sense, a blazing mass of magical energy compressed into a space too small for it. Three distinct neural signatures overlapping, which made sense for three heads. The creature was awake, alert, and radiating the particular focused aggression of an animal whose entire purpose was to guard a single point.
Through the wall, Matt could feel the faintest vibration in the stone. Breathing. The slow, heavy rhythm of lungs the size of car engines, drawing air and releasing it in cycles that resonated through the castle's foundations.
Fluffy. Cerberus. Hagrid's dog. Guarding the trapdoor to the Stone.
He'd known. Of course he'd known — meta-knowledge, confirmed by the system, cross-referenced with Dumbledore's warning at the feast about the third-floor corridor and painful death. But standing here in the dark, barefoot and eleven, feeling the pulse of something that could kill him in the time between heartbeats — that was different from knowing.
That was real.
Twig's grip tightened in his hair. Through the bond, pure terror — the Bowtruckle understood predators at a cellular level, and everything about Fluffy's signature screamed apex.
Enough. Information gathered. Time to leave.
Matt turned.
Footsteps.
Not close — fifty metres, maybe sixty, the measured tread of someone who walked these corridors every night and knew every echo. Accompanied by a second set of footsteps, lighter, faster, with the particular clicking cadence of a cat on stone.
Filch. And Mrs. Norris.
Whisper's bond erupted — danger-hide-NOW — and the Kneazle was already moving, flowing into the shadow of an alcove with the liquid grace of something that had spent its first year learning to be invisible. Matt followed, pressing himself into the recess behind a suit of armour that smelled of rust and old polish.
The footsteps grew louder. A lantern's glow preceded Filch around the corner — yellow light swinging in arcs, casting long shadows that stretched and contracted like breathing things. Mrs. Norris padded at his heels, lamp-like eyes scanning the corridor with the patient malice of a creature who lived to catch students out of bounds.
Matt held his breath. His heartbeat was thunder in his ears. The suit of armour pressed cold metal against his spine.
Mrs. Norris paused.
The cat's head turned. Those yellow eyes swept the alcove, passing over the shadow where Matt stood, passing over Whisper's tucked-tight form, passing over the Bowtruckle frozen bark-still in dark hair.
Matt's lungs burned. He didn't breathe. Didn't blink.
Whisper's bond was a flat line of stillness-quiet-invisible. The Kneazle had pulled every trace of her presence inward — scent, warmth, magical signature — until she was nothing more than a shadow among shadows. A skill learned in the cages of a Knockturn Alley breeder, where being noticed meant being hurt.
Mrs. Norris stared for three seconds. Five. Eight.
Then she turned and followed Filch down the corridor. The lantern light receded. The footsteps faded to echoes, then to silence.
Matt exhaled.
His hands shook. Not from cold — though the cold was savage, and his bare feet had gone from numb to actively painful against the stone — but from the particular adrenaline spike of nearly being caught by a man whose entire purpose in life was catching people like him.
Whisper emerged from the shadow and pressed against his ankle. Through the bond: safe-now-go-go-go.
They moved. Matt took a different route back — longer, but avoiding Filch's patrol path. Whisper led, checking every turn, every junction. Twig had burrowed so deep into Matt's hair that extracting him would require surgical precision.
Ravenclaw Tower's knocker was mercifully quick: "What has cities but no houses, forests but no trees, and rivers but no water?"
"A map," Matt breathed, and the door swung open.
The common room was still empty. The fire had died to embers. Matt crossed to the dormitory on legs that weren't entirely steady, eased the door shut behind him, and sat on his bed.
Whisper jumped up. Twig finally emerged, bark-fingers shaking. Both creatures pressed close — warm bodies against his hands, his arms, the particular comfort of animals who'd felt their person's fear and needed to confirm he was whole.
Matt stroked Whisper's fur. Scratched behind her crooked ear — the one torn in a cage, healed wrong, forever a reminder that survival left marks. She purred. The sound filled the dark room like a engine, drowning out Terry's breathing and Anthony's mumbling and the distant tick of the astronomical clock.
Fluffy is confirmed. Cerberus, Tier 3, bonded to Hagrid. Stone is beneath the trapdoor. Quirrell will go after it. Voldemort will use him. Halloween is thirty-one days away, and before the Stone crisis, there's a troll.
He reached under his pillow and pulled out the small journal he'd been keeping — coded, in a cipher he'd invented using veterinary shorthand from his past life, unreadable to anyone who didn't know canine dental notation and feline vaccination schedules.
He marked the date. Drew a small three-headed dog. Wrote a number: 31.
Then he closed the journal, lay back, and let the creatures settle against him.
Thirty-one days until Hermione was alone in a bathroom with a mountain troll and nobody knew she was there.
Thirty-one days to prepare.
Matt closed his eyes, but his mind was already mapping the route from the Great Hall to the first-floor girls' bathroom, counting steps, timing the sprint, calculating every variable that stood between an eleven-year-old girl and a creature that could crush stone with its fists.
He wasn't going to let it happen the way it happened in the books.
He was going to be there first.
Want more? The story continues on Patreon!
If you can't wait for the weekly release, you can grab +10, +15, or +20 chapters ahead of time on my Patreon page. Your support helps me keep this System running!
Read ahead here: [ patreon.com/system_enjoyer ]