The Seal of Pi

They say the Final Exam at Rumblingcreek Elementary school doesn’t just test your mind — it tests your soul. Every spring, the graduating class is locked in the Exam Hall with our math teacher, Mr. Labubu. Some students leave wan, shivering, and silent. Others don’t come away at all.

Well, Mr. Labubu was not like other teachers. His eyes… they weren’t eyes so much as pits. Black pools that swallowed the light whole. When they landed on you, you felt catalogued, weighed, and set aside. He never smiled. He didn’t even frown. His face stayed locked in a grim patience, the kind a predator has when it knows the prey’s escape is impossible.

And the chalk — my goodness, the chalk. When he wrote, it didn’t scratch. It hissed, wet and low, like skin being peeled away from bone. Every time the sound came, my teeth hurt. And my jaw tightened in reflex.

His body was short and somehow wiry, fur dark brown with the sheen of oiled leather. His ears stood rigid and sharp as blades, his black eyes pools without reflection. He never smiled. When he wrote on the chalkboard, the sound was wrong — not the scratch of chalk, but the hiss of something wet being peeled from bone.

We whispered stories. Those wrong answers made Mr. Labubu stronger. That each equation was a curse he was binding to us. That his strictness was not for discipline, but for harvest.

I used to laugh at the rumors until I saw Larry Jambeau staring at a blank wall in the library, lips moving soundlessly, black dust trailing from his mouth like ash.

The morning of the exam was hot, the air tasting faintly of metal. Sweat crawled down the backs of our necks as we lined up at the double doors of the Exam Hall.

They towered above us like a coffin lid, carved with symbols I’d never detected before — curling, serpentine numbers that started dancing and if you stared too long.

Labubu came out of the darkness. He was wearing a brownish suit, as if he used autumn leaves as camouflage. In his hand, there was a piece of chalk.

“Next one! Enter”, he said with a dry voice. Was he annoyed? Was he tired? Maybe both….

When we crossed the entrance, the doors slammed heavily, and the world transformed. We could see the hallway stretching, turning into a long, very long labyrinth of corridors. The walls were covered with blackboards. We could hear the horrible sound of screeching chalk in the distance. The sound was getting louder and louder.

Chalk dust drifted through the air like snow in a blizzard, clinging to our eyelashes. I could feel our tongues coating with the taste of old paper and something bitter.

The first problem appeared before me, alive and waiting.

I could see the numbers crawling and hissing, wriggling everywhere. They were creeping and making sounds, much like many people whispering and trying to breathe, their throats swollen from an allergy. They curled around each other like snakes. The crooked number four was stretching backwards, its bent spine was jerking like a spider sprayed with peppermint. My stomach felt like a hard heavy stone. I felt as if I was going to poop all my guts in one push.

The hollow eye of the nine pulsed, contracting and expanding as it tracked me, the way a lizard’s throat swells before it strikes.

The equal sign was no longer two lines — it was a pair of thin, trembling tendrils that vibrated with a slow, deliberate hum, like the drawn-out bowing of a violin string. A sickly hiss leaked from the creatures, faint at first, then growing sharper, more urgent — the sound of something corrosive eating into metal. The smell came next: a biting tang of acid and burnt hair.

I realized, with a sudden rush of nausea, that the hiss wasn’t just sound — it was steam. Tiny curls of it rose from their bodies as if the air itself was too fragile to hold them. When one of the smaller, darting 3s fell from the board and landed on the floor, it sizzled where it touched, leaving behind a dark, smoking scar.

The creatures began to spill from the blackboard, slinking along the edges, their bodies dragging faint trails of ash in their wake. Every movement felt deliberate, a slow encroachment, as though they weren’t just trying to reach me — they were surrounding me.

And all the while, the hissing grew louder.

When I got the answer right, the numbers still melted into the board. When I got one wrong… they didn’t vanish. They came closer. And closer. And even closer.

By the third corridor, the problems had turned alien — curving glyphs that pulsed like veins beneath skin, equations that smelled faintly of saltwater and rotting carrots in a plastic bag.

I saw Emma in another hall. She was clutching her arm, crying. A jagged seven had wrapped itself around her wrist, teeth sinking deep into flesh. Instead of blood, black ink streamed down her hand, soaking her skirt. The smell of it — sharp, chemical — burned my nostrils.

Labubu passed her without a word. His eyes, though, flicked to me. For the first time, I thought I saw urgency there.

I don’t know what led me to the door. It was smaller than I expected, and yet… somehow thicker. Its surface was carved with a spiral that pulled at my vision, a subtle tug behind my eyes, like being drawn into someone’s breath.

Inside, the air was damp and warm. For a moment, I remembered the feeling of the big halls with hot mineral waters during my summer break. The candlelight revealed walls covered in equations — not just written, but grown into the stone like roots. Some of them twitched faintly, as if sensing my presence.

Labubu stood at the center of the chamber.

“One problem’s left,” he said in a low voice. “The Seal of Pi.”

The floor split open to reveal a massive, spinning stone disk. Numbers and glyphs swam across its surface in an infinite spiral: π — 3.14159…in an endless line.

“It holds Him,” Labubu said. “The Sleeper Beneath. If the sequence fails, He rises.”

The ground shook. Something swift shifted in the darkness below—a slow, deliberate blow, like a heartbeat made of stone and meat.

I watched in horror as parts of the sequence warped. A single digit — wrong, unnatural — screamed as it twisted into a slick, many-jointed limb that scraped across the floor toward me.

“You are ready for this,” Labubu said. “You know the patterns. This is your call! Fix them, or He will rise.”

The warmth of the chamber deepened. It smelled now of rain on hot iron… and something sweeter. My skin prickled. I felt Him — not just as a threat, but as something ancient and magnetic, a presence that wanted me.

My chalk touched the stone. The instant I began writing, the numbers fought back, trying to crawl up my arm. I could feel my muscles burning. My head ached with whispers — soft, coaxing: Let me out… I can make you strong…

From the chasm below, a massive eye opened, its iris a whirlpool of gold and black. It fixed on me with something almost like… affection.

I kept writing. This time faster. The limb reared up, dripping with black ichor that hissed when it hit the floor. My heart pounded in rhythm with His. My vision blurred; for a second, I wanted to stop. To see Him fully. To step closer.

“FOCUS, my boy! You got this!” Labubu’s voice was faint and yet encouraging.

I bit my lip and I tasted blood. Digit by digit, the Seal repaired itself. The spiral tightened, forcing the wrong numbers back into place.

And then stillness surrounded me.

The eye closed. The limb slipped away. The warmth faded, leaving only the cold, dry scent of chalk.

The Seal went still. I could feel the walls no longer twitching. The whispering turned into hushing, and soon it suddenly stopped.

Labubu drooped slightly. His stiff and straight posture slowly turned him into a shrunk, dry figure, no longer looking as scary as it used to be when we came in. I noticed his thinner fur, his eyes with dark circles.

“You will forget most of this,” he said, not unkindly. “It is… safer.”

“But you….” I started. I caught myself feeling empathetic.

He shook his head. “I am not your enemy. Maybe now you can understand….”

The space started to melt, and after all was leaked down, I could recognize the Exam Hall. My friends appeared spread around, bleeding hands,s and people zoned out. Some desks were empty. All of a sudden, the doors opened wide, and the sunshine washed away the feeling of choking darkness.

The week passed in a haze. I wasn’t able to recall most of the Exam, only fragments — the smell of dust and rotten carrots, the taste of blood, and the pain in my throat, just because I was dreading an eventual end.

Graduation day was bright, the air alive with music and cheers. Parents hugged their children. Lord bless their credulousness.

At the edge of the crowd, Labubu stood alone. Our eyes met. For a second, the world went silent.

Behind him, for just an instant, I saw it — a massive shadow pressing against an unseen barrier, curling and uncurling like a sleeping lover. Waiting.

Labubu nodded at me. My stomach twisted with fear.

I nodded back.

Now, when I remember the Exam, I don’t just remember the fear. I remember the way his voice cracked. The way his shoulders slumped when it was done. The way the shadow pressed against the barrier behind him, curling in restless sleep.

Labubu’s still there, at the edge of every ceremony, every graduation. Watching the next class walk out, blinking in the sunlight. Everyone else thinks he’s just the strange, cruel math teacher who never smiles. But I know the truth.

He’s the wall between us and the dark. And one day, the Seal will move again. When it does… God help us if he’s not there