Blueblood has been soft cock-voring guards. He always shoots them out after absorbing some size, but realizes he may have overdone it when his latest pair of victims cum out looking like little colts.

Blueblood bit his lip as the first of his two victims entered his cockslit. “Mm, yes,” he murmured, his hips bucking lightly. His flared head bulged around the first guard’s head, then swelled even larger as the guard’s shoulders and torso passed in as well. Blueblood just moaned, his two-foot cock throbbing madly.

Already he could feel his balls churning, sloshing with seed that was ready to swallow up tonight’s “meals”. He gave a low, throaty moan as the first guard was swallowed up fully by his cock. His shaft, normally twenty-six inches long, almost as long around, and large enough to stick out beneath his chest when erect, almost seemed to gobble the guard down as it bulged out to the width and size of a pony.

Blueblood groaned, tossing his head back as he felt the first guard drop into his ballsack. His right nut sloshed and churned, swelling obscenely around its prisoner. His empty cock didn’t stay that way for long, though. Soon enough, it was filled by the other guard, who squirmed rather pleasantly as Blueblood’s shaft swallowed him up.

“Mm,” Blueblood murmured, stroking his massive balls eagerly. He’d been forced onto his rump due to their sheer size—there was no way he could stand in his current condition, given that a pair of ponies were currently occupying their spooge-filled depths—and groaned as he felt his enormous nuts slosh and churn with their squirming occupants.

“Not to worry,” he said under his breath. “I’ll set you free...after I take what I want.” His chest began to heave, his horn glowing and his breaths shortening as he focused his magic.

The squirming in his nuts intensified, but Blueblood paid it no mind. Instead, he began to moan, lightly at first, then more loudly. “Yes,” he murmured. “That’s it. Mmfff.”

His hips bucked lightly as his aura surrounded his whole body. Slowly, his nuts began to shrink—and the rest of his body began to grow. His chest was the first to bulk up, swelling in size and power. Blueblood groaned as his limbs thickened, his haunches grew larger and firmer, his rump swelling until it was a large, muscular bubble-butt.

His limbs lengthened while his neck grew longer, each part of his body growing with the size he was stealing from the guards trapped in his churning nuts. He huffed, panting while his cock glowed, increasing in size by the second. Twenty-six inches became twenty-eight. Thirty. Thirty-one.

He knew he should stop. He always stopped when he’d gotten this far. But being big just felt so good. Growth was the best aphrodisiac he’d ever tasted, and he wasn’t ready to give it up just yet. So on and on he went, sapping up size until he was nearly six feet tall at the shoulder. By now, he could almost look Celestia herself in the eye, and his massive stallionhood had passed three feet in length. His balls had shrunk even further, and, while still absolutely massive, now looked less like they contained full-grown stallions than adolescent colts.

He kept growing, unwilling to let the spell break—yet. Muscles thickened, and Blueblood’s breath came harder and faster. His hooves pumped his shaft while his hips jerked, his whole body growing along with it until it was clear that he was taller than Celestia, stronger than her, larger and more virile than any other pony in Equestria—

With a cry, Blueblood let his orgasm take him. His hips thumped on the ground, jerking irrhythmically as spurt after spurt of thick, creamy-white spooge erupted from his tip. There was a massive pressure at the base of his cock, and then two large shapes were shot out of his flared head with the rest of it, thick ropes of his jizz drenching them and the entire side of the room they’d landed on.

Blueblood’s hips crashed back to the ground. He was breathing hard, his thirty-nine-inch stallionhood throbbing mightily in his massive hoof. He panted, sweat streaming through his matted mane as he squinted at the two shapes and wondered why they were so small.

Two colt-sized royal guards blinked up at him. Blueblood stared at them, then glanced down at his enormous shaft, at his watermelon-sized nuts, at his bulging muscles and massive body. He hauled himself to his hooves, then glanced down at them from his new, much taller perspective.

“Well,” he drawled. “I would apologize. However…” He glanced down at his huge, bulging body, a true specimen of masculinity, and shivered with glee. “I’m afraid I’m simply too happy with the result to bother.” He turned to go, his enormous cock slapping against the underside of his belly. It stuck out a good six inches in front of him, and was thick enough to reach past his knees.

He gave an idle wave of his hoof, then grinned when he felt both his shoulders rubbing against the doorframe. “Good day,” he said, and left.