Hands flew up, a forest of desperate, warding gestures, but for most, the masks were a blur, an inevitability, phasing through clutching fingers where flesh met aura, only for the bone-like substance to impact with sickening force, or simply adhering with an unnatural, irresistible magnetism, smothering mouths and noses. A collective, wet, tearing shriek of pain and violation went up as each common mask clamped onto its designated face, edges burrowing, fusing with skin, cartilage, and bone in a horrifyingly intimate, parasitic union. Tendrils, unseen but felt, writhed and integrated. A brief, sharp jolt, like icy fire injected directly into the brain, accompanied the connection, and then they were on – immovable, unyielding.

But for Shirou Sky, my little puppet, the experience was... bespoke. As the lesser masks flew, the one he had carried, the one of higher quality from the shop, began to glow intensely from within his coat pocket. It didn't just appear; it phased through the fabric, a more substantial, intricately detailed artifact of bone and shadow, pulsing with a deeper, colder light than its mass-produced brethren. It hovered before him, radiating a palpable sense of an ancient will.

He was quickly on his knees, hands initially scrabbling at his own face as if to ward off an unseen assault, but then his eyes locked onto his mask. His muffled cries were a particularly poignant blend of generalized terror and a dawning, specific, personal dread. He knew this mask. He had held it, felt its cold promise. He tried to push it away, his hand trembling. But as his fingers brushed its surface, a jolt, colder and more profound than what the others experienced, shot up his arm. His hand went numb, then moved with a will not entirely his own; the fingers curled, drawn towards the mask as if by invisible strings for a moment. Then his arms fell, and he looked like a little lamb ready for the slaughterhouse, accepting its inevitable fate.

"Ah, a special delivery for the summoner!" I said, my amusement piqued. "No common, off-the-rack terror for you, my boy! You get the artisan model! And look at that – it seems to have taken a liking to you! Or perhaps, it's merely compelling your flesh to do its bidding. Such an improvement, really. You try to touch it, to resist, and it simply… co-opts you. Welcome to true helplessness, boy."

He stared at nothing as if a statue in a trance, and the masked raced for his face and latched on. It settled into place with a soft, final click, a perfect, chilling fit. The realization of his unwitting role in this, the naive delivery boy now forcibly partaking in the 'gifts' he'd unknowingly unleashed, was likely a fresh, exquisite torment twisting in his gut. But sadly, he couldn't savor the despair as his mask glowed and merged with his body. The freak reached for the sides of his head as if his glorious transformation was just a mere headache. The poor fool went through his transformation quickly; his red hair turned white, he grew fox ears on the top of his head, and overall looked more of a beastman than a demon, but he does have his tail and more fur, so that's something. I was thinking he would just turn into a beast completely, but that is part of the fun in gambling and investing, as we get to see the outcome of our investments in some unexpected ways. But I got to say what he said after his transformation is retarded and I will not bother having this scribe dictate it here.

"A welcome change, summoner!" I declared, my voice laced with mocking approval, as his struggles ceased, his body now still beneath the unique artifact. "You'll no longer appear as such a… pasty, unremarkable freak. This lends you a certain… gravitas. Or perhaps just makes your inevitable suffering more aesthetically pleasing to observe."

"Yes," I addressed his now still form, my thoughts a caress of pure, unadulterated malice. "You helped make this happen. You opened the box. Doesn't that fill you with a warm sense of accomplishment? Or perhaps… utter, soul-crushing despair? Even better! Welcome to the consequences of curiosity, my soon-to-be dead friend."

The gymnasium was a scene of pure, unadulterated panic now. Some others also stated to pop. I must say it was a delight to see that my dear foolish summoner's friends also changed fully during the magical moments of the screaming masses of children and adults alike among the crowd.

Masked figures – the common blanks and one uniquely adorned – stumbled blindly, clawed at their faces, collided with each other in their terror, their individual identities erased, replaced by a terrifying, uniform. The party favors had been delivered. The true festivities were about to begin.

The gymnasium was a bedlam of muffled screams and stumbling, newly masked figures. Their individual identities had been horrifyingly erased, replaced by a uniform, terrifying blankness – save for Shirou, and those like him, whose ornate masks had already been dominated by their masks during the transformation, remained still and looked composed. The rest clawed at their masked faces, a gesture of pure, instinctual revulsion, but the masks were as much a part of them now as their own bones, until they took full control and stood in the room as statues in a wax museum.

"Masks distributed?" I mentally ticked off my checklist, hovering serenely in my spotlight, a conductor surveying his orchestra as it reached a crescendo of terror. "Check. Audience prepped, suitably terrified, and thoroughly dehumanized? Double check! Now then..."

I spread my arms wide, a gesture of magnanimous, all-encompassing power. My voice, no longer a purr but a resonant boom that seemed to shake the very foundations of their pitiful little school, filled the space.

"The preliminaries are concluded, my little art projects!" I announced. "The true festivities, the real education, require a… change of venue! This drab, sweat-stained hall simply will not do for the masterpiece I intend to sculpt from your suffering! We need a grander stage! A more… elemental backdrop!"

As I spoke, the air in the very center of the gymnasium, directly beneath me, began to shimmer, much like it had before the masks appeared, but this time with a violent, tearing intensity. It was as if the fabric of their reality, that thin, flimsy veil they all took for granted, was being stretched beyond its limits. Colors not found in any earthly spectrum began to bleed into existence – sickly greens, impossible blues, reds that screamed of dying suns, purples and pinks that twisted the mind. The air crackled with an energy that made hair stand on end and teeth ache.

A low, guttural tearing sound, like a giant claw ripping through canvas, filled the gym, drowning out the students' panicked cries. The shimmering air ripped open.

It was not a door, not a window, but a wound in the reality of the world. A swirling vortex of chaotic light, a maelstrom of impossible geometries and screaming colors that defied sanity. Strange, distorted sounds, like the whispers of mad gods and the grinding of cosmic gears, pulsed from its depths. It was a gateway to somewhere… else. Somewhere utterly alien.

"Behold!" I cried, my voice filled with triumphant glee. "A portal! A doorway to new experiences! A bit drafty, perhaps, but the destination is so much more interesting than this tedious little speck of a planet! Consider it an all-expenses-paid trip to the very edge of your understanding!"

The portal pulsed, and a powerful, irresistible force erupted from its swirling depths, like the intake of some colossal, unseen lung. It wasn't wind as they knew it; it was a focused, localized distortion of gravity, a hungry vacuum. Loose decorations – crepe paper streamers, deflated balloons – were sucked in instantly, vanishing without a trace. Then, the punch bowl, the snack tables, and even a few stray chairs skittered across the floor and were devoured by the vortex.

The masked students and adults screamed anew, a raw, primal sound of absolute terror. They lost their footing, their bodies scrambling uselessly against the pull. They momentarily regained control as most clawed at the floor, grabbed onto pillars, and clung to each other in desperate, tangled knots, but it was no use. The force was absolute, a cosmic tide dragging them towards the impossible abyss.

"All aboard!" I sang out, my voice a joyous counterpoint to their terror. "Express service to your new beginning! Don't push, there's plenty of existential horror for everyone! Look at them flail! Like leaves or cows in a tornado! Like insignificant insects caught in a god's breath! Magnificent!"

One by one, then in struggling clusters, they were lifted from their feet, their muffled cries lost as they were pulled inexorably into the swirling, screaming colors of the portal. Shirou, Katy, Gail, Sarah, Steve, Ms. Linz, the chaperones, every last one of the students, and those present vanished into the maw of the unknown.

I watched them go, floating calmly, unaffected by the pull, a director observing the final, dramatic exit of his cast. "Do try to stick the landing!" I called after the last disappearing figure, though I doubted they could hear me over the roar of the portal and their own terror. "And send a postcard… if you survive! Though I suspect the postal service where you're going is rather unreliable."

Once the vortex had swallowed the last student, the portal itself began to convulse. It shrank rapidly, the impossible colors folding in on themselves, the tearing sound rising to a final, deafening shriek, and then, with a snap like the universe itself blinking, it vanished.

Silence descended upon the gymnasium once more. A profound, echoing silence, broken only by the faint hum of the single spotlight still illuminating my magnificent form. The gym floor was a mess of overturned furniture, scattered debris, and the lingering scent of ozone and fear. But it was empty. Utterly empty of human life.

"Curtain down," I murmured with deep satisfaction, lowering my arms. "End scene. Applause optional, but always appreciated." I paused, a thought striking me with the suddenness of a minor epiphany. "Ah, but one mustn't forget the props. Especially not the ones that started this whole delightful chain of events."

With a casual flick of my wrist, a small, shimmering tear appeared in the air beside me – a brief, jagged wound in space-time that offered a fleeting glimpse into a messy teenage bedroom. I reached into this rift, my hand phasing through the mundane reality of Shirou Sky's private sanctum, and retrieved the clay box, the one depicting ancient battles, still containing its little bronze gong. It felt pleasantly cool in my grasp.

"Can't leave old friends behind, can we?" I mused, examining the box. "Especially not friends who might prove useful for future… performances. Or perhaps, just for summoning more interesting playthings, but that is the point of friends, to make merry with." A final, satisfied glance at the empty gymnasium, I turned and stepped back into the deeper shadows from whence I'd come, the darkness eagerly embracing me. My couch of solidified despair awaited, along with the perfect vantage point to observe the unfolding chaos in the new world. "Now then," I thought, settling in, the clay box resting beside me, "let's check in on our little travelers, shall we? The real story, their true education, is just beginning."