The mighty, jet-black alicorn known as Nightmare Moon stood upon a platform within the Castle of the Two Sisters within the throne room. Before her, floating in mid air was the six wielders of the elements of harmony. Their eyes and bodies were glowing with blinding white light. Nightmare Moon closed her eyes to shield her eyesight from the oncoming rainbow laser rapidly coming toward her. But otherwise, she did nothing else.

The rainbow laser indeed hit her with a dramatic blasting sound. But otherwise, she seemed unharmed. Twilight, Pinkie Pie, Applejack, Rainbow Dash, Rarity, and Fluttershy gasped in shock as they floated back down onto their hooves upon the floor.

A strange, rainbow electricity like magical essence protruded out from Nightmare Moon’s black coat. The crescent moons upon her cutie marks glowed with a blinding white light.

“MWAHAHAHAHAHAHAHA! You foals. Did you really think I spent the last thousand years on the moon not perfecting a counterspell? Your foolish attempt to stop me has only made me stronger. The Power of the Elements now reside within me! I shall rule Equestria, and beyond. This very universe is at my mercy! All shall love me and despair!”

“Oh yeah! We can still stop you!” roared Rainbow, rapidly flying toward her to strike her face with her right hoof. This was followed with a bone cracking sound as her hoof broke upon impact.

Rainbow cried, clutching her broken hoof, tears falling down her cheeks as she lay on the floor before Nightmare Moon.

Nightmare Moon laughed cruelly for a brief moment. Before she suddenly looked down at Rainbow with a look of concern. She could not quite put her hoof on it. The sight of seeing Rainbow in pain seemed to be unsettling her. The sight of tears falling down her cheeks and her screaming in pain, caused her to tremble.

Nightmare Moon shook her head trying to dismiss her empathetic feelings towards Rainbow’s pain. ‘She is an enemy. I should not be feeling pity towards her. It must be a side effect of the Elements of Harmony.’ came her thoughts.

Nightmare Moon watched on as her five other friends surrounded Rainbow in a group hug to try to comfort her. Her lower lip began to quiver at the sight… and a single tear managed to slip out from the corner of her right eye.

The Dark Mare gasped in shock, and made sure to quickly teleport the tear away with a flash from her horn.

With an angry grunt her horn wrapped in an azure glow. At the same time, Rainbow’s hoof became wrapped in the same glow as Nightmare Moon’s glow. A moment later, the light faded, this was shortly followed with Rainbow’s hoof being magically healed.

Rainbow and her friends gasped in shock, and looked up at Nightmare Moon in confusion.

“Don’t be such an idiot next time!” Nightmare Moon shouted, stomping her hooves. The stone floor cracked beneath her, the slam of her hooves made a deep crater underneath.

Dust and debris fell from the ceiling, before a series of large stones came loose from the ceiling. Time itself seemed to slow down. She observed the looks of terror upon the six little ponies below her as the stones above fell at slow motion down upon them.

Nightmare Moon lunged forward to stand over the ponies beneath her. Her horn glowed, she used her magic to greatly expand the mass of her body outward. She now loomed over the little ponies as large as a mighty elephant from the faraway lands to the east.

When time was restored to normal, the stones fell down and harmlessly bounced off her body.

“You… you… saved us?” asked Twilight in a low voice.

“Why of course. I can’t let you go to waste. While the Elements won’t let me harm you in a conventional sense. I can still exorb your souls into me. You and many others shall live on inside me forever and ever.”

They screamed in fear as their bodies turned into a rainbow mist underneath her. The Dark Mare opened her mouth, and swallowed down the magical mist into her.

“There you go. Nice and safe. No harm will come to you now, my subjects.”

She giggled as her body rose up further into the air. She could not help but release a deep moan of pleasure as she felt her magical strength increase. Her marehood became moist, and began to leak out thick, creamy fluid between the thick canyon of her bubbly rump’s cheeks.

There came a flash of blinding light, followed by the appearance of Princess Celestia prone on her back upon the floor beneath Nightmare Moon’s massive rump.

“Nightmare Moon? You won? Where is Twilight and her friends?” Celestia asked in a fearful tone.

“Don’t worry. Twilight and her friends are fine. They live inside me now. You shall soon join them, along with everything else.”

Celestia made to stand up, but before she could Nightmare Moon slammed her massive ass down upon her.

She pressed her hooves into the sides of the Dark Mare's thick cheeks, depressing deeply into the soft, warm, bubbly cheeks of her ass. She grunted as she attempted to lift the massive mare up off her face. But her struggles were in vain. There was no lifting to be had. Nightmare Moon’s ass was just too big and heavy for her to lift.

“Hah! Now you know what it’s like to have a smaller rump, dear sister.”

Suddenly, Celestia’s body became wrapped in a rainbow light. Celestia below the Dark Mare began to grow in size rapidly. Little by little, Celestia was able to push the Dark Mare's massive rump off her.

“No! The elements betray me!” she shouted in panic. Nightmare Moon teleported herself back onto the platform she stood on beforehand. “I won’t let you beat me this time! Our rump shall block out the sun!” she shouted, pointing her right hoof at her threateningly.

Celestia gave her a smug grin, and flared out her wings with pride. “Nightmare Moon, your rump can’t hope to match mine.”

With that Nightmare Moon roared in anger, and unleashed a black death laser from her horn. The laser struck Celestia with a dramatic blasting sound, but otherwise left her unharmed.

“It appears we are evenly matched. No matter. I shall add this universe’s matter to my own and grow stronger to defeat you!” Nightmare Moon boomed.

“Not if anything to say about it I have!” Celestia replied back calmly.

Author's Note

I want it to start small. Before I crazy with expansion.