a wizard sets up such a trap in one of their old dungeon hideouts and spreads rumors of great treasures inside(because wizards lack any sense of right and wrong)
curious adventuring parties shrink to a miniscule size upon entering the central chamber
victims are essentially trapped due to the journey back to the entrance being week long trek fraught with bulette sized ants, purple worm sized centipedes, and tarrasque sized rats
a community developes with each ill fated group that arrive, and eventually grows into a town of shrunken adventurers
they manage a meager existence, fighting off the aforementioned vermin, harvesting food from castle sized mushrooms, and drawing water from enormous beads of condensation
the dungeon gains a reputation of being one from which there is no return, and becomes avoided and forgotten

Until one day... The village's mundane activities is broken by a reverberating echo, which sounds like a roll of thunder but is recognized by those who have been trapped there a decade or more as a voice
They recognize the sounds of the approach of a regular sized adventurer, the news brings the most recent arrivals a feeling of hope, but long time residents know that this newcomer is as doomed as the rest of them
Efforts were made in the past to warn those who would enter the cursed chamber but were met with failure
Any attempt made by mages was a no go, the voices of Wizards and Sorcerers too minute to perform the verbal components to their spells necessary to channel arcane energies, and Warlocks small and pathetic forms being long abandoned and forgotten by their patrons
The strongest fighters and barbarians among the village once attempted to display a message, barely managing to push boulder sized pebbles into a simple "STOP", only for it to go unnoticed and thoughtlessly kicked aside by the next arrival
Although the voice grew closer, the villagers were unable understand the Draconic language it was speaking. Their only possible translator, the village's sole Dragonborn, once a mighty 7 foot tall warrior, was recently slain by a mere field mouse
The voice and accompanying footsteps became louder still as a figure entered the threshold of the room, a relative couple of miles from the town's location in the center
A torch in their hand reveals the figure as a kobold, a raggedy robe draped over her lean yet shapely body
The villagers look on as she continues to talk to herself, some shouting in vain to get her attention, others just dejectedly waiting for her to join their shrunken ranks
"Let's see, Master said it was 2 lefts, a right, another left, and then down the stairs, ah, this should be it"
She places her torch on the ground and retrieves a piece of parchment from her bag, and begins to read from it awkwardly and haltingly as she attempts to pronounce the words inscribed upon it
She finally reaches the end, speaking the last syllable with a hint of pride, a magical circle filled with runes appears on the floor and glows brightly with a hum, before fading out and once again becoming silent
This sudden development shocked the village's residents, and excited murmurs of the curse potentially being broken quickly spread, although it was obvious that none of them were growing back to their original size
Some of the villagers ran out to greet their savior and to catch her attention, when she began to mumble to herself again
"Well, this is definitely the place since Master's disenchantment spell worked, but I don't see anyone here... Hmm, if they're already gone maybe they left a note behind"
As she began to step into the room, the would be welcoming party realized their grave mistake, that despite normally being a diminutive creature that you would hardly notice if she walked by you in a tavern or marketplace, this kobold was now bigger than than any dragon they had encountered, bigger than any mountain they had climbed
Their shouts of joy quickly turned into screams of panic as they tried to run away from her rapidly approaching scaly feet
The panic soon spread to the village itself, everyone now in grim recognition of the situation, and never having prepared themselves for the possibility that a normal sized individual would make it past the trap and reach their current home
Some fled the town entirely, leaving behind what meager possessions they had because of the presence of the apocalyptic kobold, others retreated into the largest structure around, a hollowed out mushroom from which they "mined" most of their food
Just as her thunderous footsteps were about to reach the flagstone that supported the entire town, a brave alchemist ran out into the streets carrying an armful of black powder grains that he had salvaged, and used it to send up a plume of dark gray smoke
Although she did not notice the smoke before it dissipated, she did detect a slight acrid odor which caused her to cast her eyes downwards
"Oh there you all are! Wow, you're even smaller than Master said you would be! Master is even smarter and more powerful than Noc Noc thought, I can't for you all to get the chance to meet Master!"
Those remaining outside looked up at the towering kobold in a mix of relief and confusion as she continued to babble on in Draconic
"Oh yeah, I should've mentioned, Master needs me to bring some of you back to the workshop, so if you could just stay still...
Panicked running and screams of terror once again spread through the village as the kobold's massive clawed hand blotted out their vision and touched down around them, her talons scraping along the floor only to come up empty handed
"Aw shoot, come back! Why aren't you guys listening to me... Wait, let me try this..."
She licks the palm of her hand and gently presses it down upon a group of fleeing adventurers, then lifts it up revealing several dozen of them trapped in her saliva
"Aha, got you! Now I just gotta...Umm... Oops... Where am I supposed to keep all of you...Uhhh, wait, how about..."
She rummages around in her bag, and with an "Aha!", retrieves a small healing potion from her supplies
After uncorking the bottle with her teeth, she proceeds to pour out it's contents out onto the floor, which creates a flood of sparkling red liquid that washes away the nearby villagers and their huts, erasing any trace of the existence of the tiny settlement
"Heh, whoops... I guess I could've just, um, drunk the potion... Sorry..." she mumbled, embarrassed as she watched the town and its residents were swept away into a crack along the edge of the flagstone
Refocusing her attention on the adventurers in her hand, she carefully funnels them through the mouth of the vial and seals up their new prison by replacing the cork
"There we go, safe and sound! Next stop, Master's workshop! But first, a little snack for the road..."
She reaches down and plucks the mushroom from the dungeon floor, giving those hidden inside a sickening sense of vertigo, and then drops it into her gaping maw, greedily swallowing it whole
She then retrieves her torch, and the kobold begins her way back out of the dungeon with a skip in her step