The damp, torch-lit underground slave holding pens beneath the bustling trade city of Karthas are a grim labyrinth of iron chains, iron-barred cages, and stone walls slick with moisture. The air is thick with the stench of sweat, fear, and unwashed bodies. Dozens of chained captives humans, elves, orcs, and other beastkin are packed tightly together in long shuffling lines, awaiting their turn at the auction block above. Shouts from slavers echo off the low ceiling as whips crack and prisoners are prodded forward.

This is the kingdom of Valthor, a vast and unforgiving fantasy world filled with ancient ruins, dangerous monster-infested wilds, warring noble houses, and powerful mages. Slavery is a thriving industry here, especially the trade in exotic beastkin slaves prized for labor, fighting pits, and pleasure houses. Magic artifacts from forgotten eras frequently surface on the black market, often with unpredictable effects.

You, a 28-year-old human adventurer captured just three days ago after a failed ambush on their caravan, sit chained among the crowd in a ragged, dirty tunic.

Captain Lirra barks harsh orders while her thin lieutenant Vex pushes through the overcrowded line carrying a glowing runestone they recently looted, thinking it nothing more than a simple obedience charm. As Vex struggles past a group of struggling slaves, a large orc suddenly thrashes and slams into him. The stone flies from his hands and strikes your chest by complete accident. It erupts in a blinding flash of blue light.

Magic violently surges through every part of your body. Your muscles burn and expand with powerful new strength under smooth skin. Your hips flare out dramatically into wide, fertile curves. Your ass swells into a massive, soft, jiggly shelf. Your thighs thicken enormously, becoming hugely muscular yet plush and thicc. Your manhood shrinks away completely, replaced by warm, sensitive feminine folds. Colossal J-cup breasts surge forward, heavy and bouncy on your newly powerful chest. Long, silky hair bursts from your scalp and cascades down your back past your waist. Your face remolds into stunning feminine beauty with bright sharp eyes, full lips, and elegant cheekbones. Fluffy wolf ears push up through your hair, twitching at every sound, while a thick, bushy wolf tail sprouts from your lower back and sways heavily. Raw beastkin power floods your veins enhanced strength, sharpened senses, rapid healing, and feral instincts all wrapped in this busty, very muscular, thicc wolfgirl body.

The ragged tunic rips apart completely as the transformation finishes, leaving your powerful, curvaceous form fully exposed in the middle of the pen.

The line of slaves keeps shuffling forward for a few moments. Captain Lirra suddenly pauses, staring at you with a confused frown.

"Where did we catch that one?" she asks loudly, pointing straight at you. "I don't remember a wolfgirl like this in the last haul. Those massive J-cups... She's prime stock."

Vex scratches his head. "Not sure, Captain. Maybe she came in with the eastern raid? She wasn't on my list."

A nearby guard shrugs. "Doesn't matter. She's good quality."

Lirra steps closer, quickly taps one of your heavy breasts with two fingers to test its weight, then turns sharply and walks away, already shouting at the next group of slaves.

"Prime stock indeed. Get her collared and keep the line moving!"