King Sombra smiled as he saw the town ponies shiver in fear at the sight of him. All the exhaustion of having to instill fear all the time and command your servants to do your dirtywork was worth the rush of power he felt when he saw himself in absolute control over these weak crystal ponies.

Another year had passed again. It was time to select his newest addition to his personal harem.

He walked over to the mares, lined up in the streets as he had ordered. Such young, fragile things. All ponies in his empire were thin, except for the special ones he keeps at his castle. Not really a surprise, considering he took the majority of the food grown in his empire for himself and his mares.

Every time he eyed one of the young mares more closely, he could feel the hearts of their parents beat faster in fear. They did not know what he did to the mares after taking them. For the general populace it looked like he just personally selected a young mare each year, who is then taken to his castle, never to be seen again. It did not take long for the first rumors to start circulating. Some said he ate them, others said he sacrificed them or bathed in their blood in order to gain his powers.

Sombra did not try to stop the rumors from circulating. Uncertainty and the imagination of the ponies concocted a nice mix of mystique and dread around his character, which only helped him secure his position of power.

He stopped in front of a particularly beautiful mare.

"Mmmmhm, I like her...maybe I'll choose her this year...", he said with his deep voice before licking one of his fangs.

The ponies did not dare to speak up. The mare's legs began to tremble as the Crystal King closed up to her, his large size towering over the meek pony. Her parents couldn't do anything but watch with tears in their eyes as he roughly groped her right in front of them.

"Yes, yes! She has...potential!"

Sombra couldn't help but imagine watching her grow, her small frame replaced with a more and more curvaceous frame. Soft layers of flab first coating her rump, making her now pillowy butt jiggle as she moves. Her belly inching lower towards the ground as her stomach grew to a fat barrel, even pushing into her legs. And finally her face puffing up, cute, round cheeks on top of a soft neck. He saw her expression change, to one of blissful obedience, moaning his name between his forceful thrusts as her entire body jiggles.

The Crystal King exhaled through his nose as he felt himself warming up and then smiled again.

"She will do."

Immediately two of his servants came over and began chaining, gagging and blindfolding his chosen mare. She struggled, but her frail, thin body was no match for Sombra's well-fed and well trained servants and she was soon dragged toward his castle.

Sombra chuckled to himself as he turned around to return to his castle as well, ignoring the cries of the young mare's mother who couldn't hold back her anger and sadness any longer. He got what he came for, now the real fun could begin.

Introducing a new mare to Sombra's harem was not really a complicated process.

The new mare would be put on a strict eating schedule. If she was obedient and kept eating her large portions, she would be pampered every day and soon learned that serving King Sombra could be a very fulfilling, satisfying life. If she refused, she was forced. For mild cases she would be kept up all night, being poked with sharp crystals as servants crammed the food in her maw every time she yelped. Usually mares stopped resisting and began accepting their fate after about two of such unpleasant nights.

Sometimes though a mare would even resist this treatment.

In such extreme cases, Sombra himself stepped in and broke the mare personally.

The mare got brought in to a mostly empty room and got chained to the floor. In there, King Sombra was already waiting for her. His eyes glowing with the dark energy of his blackened heart, he began to change himself into a different form. His body evaporated into a dark mist, filling the room with his essence. The mare was surrounded by complete darkness. She could feel the cold touch of Sombra all over her as he engulfed her more and more closely, until she was unable to move. The mare lost control over her body, Sombra's shadow blocking her sight, pouring down her ears and filling her lungs with each breath she took.

She could feel how her mouth opened by itself before Sombra's essence began pouring down into her relentlessly, filling her stomach. Her mind went blank, every individual thought washed away by his droning voice echoing through her mind.

"You are mine, slave. You will obey, slave. You will serve me in every way, slave."

The mare, completely surrounded by the darkness, seemed to float in the void around her. Sombra's essence touched her, filled her, his cold embrace coursing throughout her entire body. More and more of his form crashed down into her maw into her full stomach.

Deprived by almost all of her senses, the sensation of her mid filling up to its limit became particularly intense for her. She could feel every little throb of her expanding belly, swelling to an obscene size as she could do nothing but let it happen to her.

"You love being full, slave. You love to eat, slave."

At this point the mare could feel her entire body being rubbed all over. Tiny tendrils explored her body. The length of her throat felt like it was being licked with a slimy tongue, the outer pressure making her sense the globs of dark matter being pumped down her throat more intensely. Rough hooves seemed to explore the vast expanse of her inflated belly, rubbing over the taut, sensitive skin as her expanding stomach pushed out a bit farther with each moment.

"You love to please me in every way, slave."

Warmth spread in her lower regions, a ticklish sensation that quickly took hold of her folds, her dainty teats and her puckered hole. It didn't take long for her to grow aroused, regardless of the inner pressure and pain she felt from her bloated stomach, as the warmth grew inwards and traveled along her spine throughout her body, a stark contrast to the coldness that had engulfed her.

"Eat for me, slave. Service me, slave."

The pain in her stomach subsided, as if pushed away by the warmth. The mare felt how her hips involuntarily began to buck, begging for something to fill her and extinguish the fire that resided inside her. Anyone, or anything, please!

And with that, the treatment suddenly stopped.

In a blink of an eye the King rematerialized in front of the pony as the world returned around her. She fell to the ground, her weak legs incapable of supporting her new weight.

"That will be enough for today."

He laughed a sinister laugh and left the mare alone in the bland room.

"I will see you tomorrow," he said before locking the door behind himself.

The mare is lying on the cold floor and didn't even notice King Sombra leaving the room. Her eyes were staring vacantly in front of her, occasionally rolling up when she rubbed her grotesquely swollen orb of a belly, glowing with a dark shimmer even through her fur. Sombra's essence still filled her and would keep teasing her throughout the entire night. Thoughts of obedience and fullness would bring her pleasure, but would never allow her to fully release. Throaty moans escaped her lips as she felt the warmth flare up again every time she touched her full mid, her arousal strong enough to cause her wetness to splatter on the floor.

She would be ready very soon now.

Author's Note

Holy shit, did I really manage to pull out a 1300 word chapter out of the first eight greentext lines?