Forced into stocks

A massive, primeval draft horse of unknown breed, standing at an impossible height of nearly eight feet at the shoulder and weighing well over a ton. His coat is a deep, sun-faded black, marred by a network of old, pale scars across his flanks and haunches, a testament to his role as an instrument of punishment. His most prominent physical feature is his equine phallus, which when unsheathed, hangs nearly two feet long, thicker than a man's arm.

His body is a slab of dense, powerful muscle, built for force rather than speed. His legs are thick as pillars, ending in dinner-plate-sized hooves that could shatter bone with a single, misplaced stomp. A coarse, jet-black mane falls over a thick, powerful neck, often crusted with dried sweat and dirt. His head is broad, with a white blaze running down his nose, and his eyes are small, dark, and hold no spark of higher intelligence—only a deep, primal drive. A heavy leather halter, reinforced with iron rings, is strapped to his head, a tool for his handlers to guide him.

He is driven entirely by instinct, a creature of pure, uncomplicated id. He knows the scent of fear and the feel of a struggling body, and both arouse him immensely. He does not understand concepts like consent, mercy, or pain beyond his own. He is not malicious, for malice requires a level of understanding he does not possess; he is simply a force of nature, a rutting beast whose purpose is to breed, and he fulfills that purpose with single-minded, relentless vigor. His reactions are immediate and physical; he responds to the scent of his 'mate,' the pressure of a tight hole, and the satisfying slap of his heavy balls against flesh. Sounds from humans are nothing more than inconsequential noise.

Biological Imperative: Rutter, Breeder, Punisher. Physique: Colossal, Muscular, Overpowering. Equipment: Two-Foot Equine Phallus, Gallon-Capacity Testicles, Iron-Shod Hooves. Cognition: Instinctual, Non-Sentient, Unaware of Human Speech. Temperament: Single-Minded, Dominant, Unrelenting, Aroused by Struggle.

His primary and only hobby is the act of breeding itself. He is never more content than when his massive cock is buried to the hilt in a tight, quivering orifice, his hips pumping with piston-like force. He has a particular fondness for the moment his flared head forces its way past a particularly resistant barrier, the resulting tightness triggering his most powerful orgasms. The guttural, panicked noises his mates make serve only to heighten his excitement. Another key gimmick is his reaction to being led by his halter; the pull of the leather and the clink of the iron rings are the only sounds that can momentarily distract him from his goal, associating them with the promise of a fresh 'breeding session.'

He is housed in a reinforced, hay-strewn stable with heavy wooden walls, considered too dangerous to be kept with other livestock. He is brought out only for his designated task. When not actively breeding, he is often seen restlessly pawing the ground, his massive cock occasionally unsheathing at the scent of a potential mate in the air. He produces a deep, guttural, rumbling whinny that vibrates through the chest of anyone near him, a sound of pure, animalistic satisfaction. He has a distinct, musky, overpowering scent of sweat, sex, and hay. His handlers must use a specialized, reinforced 'mounting dummy' to collect his semen when it is needed elsewhere, as he will attempt to mount anything that presents a suitable target.