"One last time. Are you sure that you want to be my eternal slave? To do everything I command? To suffer for my amusement? To serve me loyally? To spend your immortal life pleasing me?" I shiver as the freezing snowy wind flows through the snow covered trees, the only thing hiding my privacy, blowing against my naked body as I stand next to my master, ready to prove myself to him, desperate to receive his gifts, to be immortal, to have meaning and purpose, to be wanted forever. 

"Y... yes... s... s... sir." His smile warms my cold body, happy to know that I'm pleasing him, the knowledge helping to keep me focused as my buried feet begin to feel pain from the icy snow around them, although I stay still, showing him my strength and resolve. 

"As an immortal sorcerer I can grant you your wish, I can give you immortality and bind you to my will forever. But first you must pass one final test." I struggle to listen carefully, the frost beginning to make its way into my body. I let out a chattering moan as his warm hand plays with my swollen and denied balls, the skin cold and trying to push them inside my warm body, only to be prevented by the tight metal ring, causing slight discomfort as it squeezes them, my caged cock straining against the icy metal that tightly encases it.

"The key to your cage is hidden somewhere deep in this mountainous forest. Your test is to find it. But with each step you will grow more horny and aroused, so you better find it quickly if you wish to remain sane. I will grant you immortality for your task, you will not die from the cold or lack of food and water, nor any injury, be it from a fall, frostbite or wild animal. However if you leave this forest before finding it you will never serve me, you will spend an eternal existence alone and with no release, roaming the world forever, alone and unwanted, unable to ever find relief. Understand?" I feel my cock straining at the thought of finally obtaining the key to my cage and gaining some relief, and also reaching my dream of serving my master in eternal submission, and I nod.

"Y... yes... sir. I... I... under... s... stand." I smile as I feel his warm hand lovingly stroke my reddening cheek. There is nothing I wouldn’t do for him, he found me all alone, with no one, he gave me purpose and meaning, a chance to be something, even if it is just to serve him as his slave, not only that but the gift of immortality, never to be separated by time. I hope my last test doesn’t take to long, I’d hate to be without him for even a moment.

"Off you go my slave." I do as he commands and race of into the frozen forest, eager to find my key and prove myself, to earn my place as his loyal slave, to be by his side forever.

I watch the naked slave run off into the snow covered trees and smile with cruel amusement. As I shiver from the damp cold I open a portal behind me and step backwards through it into the warmth of my dry home. As the portal closes I take one last look at my naked slave desperately digging through the freezing snow, his body already shaking and shivering as he searches for the key to his cage, his skin lightly covered by freshly falling flakes as the sun begins to set. Soon his fingers will go numb and his lips blue, then the hunger will begin to grow and his desperation will grow, as will his need to cum, the numbness will both help and harm his frantic search, unable to feel pain but also unable to feel the key. The freezing evening wind whistles as it manages to gust though the closing portal, sending his body into one last shiver before disappearing, leaving only the inside of his warm and comfortable home. 

I pull out the shiny metal key from my pocket and smile in amusement as it glints in the warm light of my home. Part of me feels sorry for him but he did fail the test and now he will be punished. A truly worthy slave would have said that they don't need the key or to be released. Still, he is immortal and he does get to serve me and suffer for my pleasure, so in a way he is getting exactly what he wanted. Maybe after a few thousand years I'll visit him and see if he will pass the test. I wonder if he'll be shivering more from the freezing cold or his desire to cum? Or if there is anything but a wild, crazed, desperate, frantic animal left to even understand what I am offering? That’s if I don’t find someone truly willing before then or remember.

Epilogue:

I look around the forest as I hear a strange digging noise. I shake my head and smile slightly as I think of the superstitious stories people tell of the monster who lives up in the mountains, a feral beast, one who used to be a man long ago, tricked and cursed by an evil sorcerer, doomed to search for a lost treasure to break its curse, or some say is a missing link between man and the wild animals we came from, although I'm sure it was just some small woodland creature or something. 

I suddenly see a shadowy figure jump out from the bushes, its thin, frail and starved body slams into me, knocking me over, more from shock than any force. I stare up in terror at the crazed beast standing above me, its skin cold and pale, its hands and feet black, frostbitten and shaking, its body shivering, its rotting teeth chattering and its eyes wild, unfocused, yet also constantly looking around as if desperately searching for something, barely aware of its surroundings, it’s mind nothing but pure primal need and desire, if it ever was a man the humanity has long faded. What it is looking for? I think I can guess as I see its huge, oversized, swollen, blue balls, its cock straining and dripping behind a tiny 1 inch metal tube, small murky icicles cling to his balls where his endless stream of pre cum has frozen solid. 

I panic as his hands run over my body, frantically searching my pockets before looking around, a look of pure desperation and sad need on its face, clearly not finding whatever it seeks, a small, haunting, broken, sad, desperate, mournful, quiet whimper exiting its chattering mouth before racing off into the trees, continuing its millennia long futile search. I can't help but feel sorry for the poor creature, the stories of it have existed for over a thousand years, if true then they've had that thing locked on them for so long, anyone would be driven insane after that long denied and frustrated. 

As I stare into the forest where the creature vanished into part of me feels strangely curious as to what happened and how someone would end up in such a situation, one that I concerningly find slightly arousing.

“Hi there. Are you alright?” I jump and turn to see a well dressed man, one not dressed for the cold weather. Where did he come from? I didn’t hear his footsteps, nor did I see him anywhere nearby as I was walking on my own.

“Here, let me help you up.” he smiles kindly as he holds out his hand to help pull me up.

“Thanks.” as I take his hand I feel a strange attraction to him, as if wishing to submit to him.