The pool of shadows vanished as silently as it had appeared. Sombra, a look of malicious joy on his face, held out his hoof to Twilight who took it eagerly.

"Only two more obstacles remain, my dear." Sombra said, pulling Twilight close to him. She gazed up into his eyes with the same smile he wore. "And what insignificant obstacles they are." She said, slyly. Narrowing her eyes seductively. "Their heads will make fine additions to our throne room."

A ravenous look passed over Sombra as he leaned in closely to Twilight. “Hm, fine addition indeed.” He said, drawing her into a kiss.

Ignoring the pair, Rainbow Dash moved past them, her hooves splashing softly in the pooling blood, before kneeling beside the still form of Pinkie Pie.

She glanced over her friends blood soaked body, before gently closing her eyes. A soft moan from Twilight sounded behind her as she rose and moved next to Fluttershy.

At the sight of her life long friends terrified gaze, Rainbow felt the smallest amount of remorse. One she tried to bury with little success.

Grimacing, she grasped the hilt of Steadfast’s sword in her teeth and slowly removed the sword from its fleshy sheath. Once free, she gave the blade a quick flick, flinging the blood from its surface, before sliding it through a spare strap on her back.

She was just about to close Fluttershys eyes when the sense of somepony watching gave her pause.

“A little early to be honouring the dead, Shadowbolt.” Said Sombra. Rainbow Dash looked behind her to see both him and Twilight smiling knowingly at her. “Such practice is usually left until after the enemy has been thoroughly defeated and last I checked...” His eyes flashed brightly. “Two yet remain”

“They were my friends.” Rainbow said simply. Turning and closing Fluttershys eyes. “They deserve this much.”

“They were my friends as well.” Said Twilight, causing Rainbow Dash to sneer vehemently.

“Sure.” Rainbow said angrily. “That still didn't stop you from killing Fluttershy even after you said you were going to let her go!” She looked towards the ceiling as she attempted to gain control of her anger. Feeling her self control failing rapidly, Rainbow turned and leveled her rage filled gaze at the dark couple.

“Why did she have to die?! Why her?! What threat was she to us?!” Rainbow Dash's voice reverberated through the hallway as she thrust a hoof accusingly at Twilight. “You could have spared her! You spared Luna, one of The ‘Alicorn beasts’! If her then why not Fluttershy?!”

Sombra smiled soothingly. “Shadowbolt-”

“And you!” Shouted Rainbow, moving her hoof to point at Sombra. “Why didn't you stop her?!”

Rainbow Dash's voice began to quaver as she covered her face with her hoof. “Why didn't I?” She finished in a shaky whisper.

Several moments passed in silence.

"Finished?." asked Twilight, breaking the silence.

Rainbow Dash inhaled a deep, shaky breath before dropping her hoof back to the ground. “Yeah.” She answered, looking Twilight in the eye. “Yeah I'm done.”

Twilight stepped away from Sombra and placed a comforting hoof on Rainbow's shoulder and smiled. “That a girl!”

Rainbow found she couldn't bare the sight of Twilight's smile.

Sombra growled softly. “If you two are quite finished, we have one final matter to deal with.”

“You're right.” Said Twilight, moving past Rainbow to stare intently at the door. “One last obstacle.”

“Yes.” Hissed Sombra as he too moved to stand beside Twilight. Rainbow Dash gave the bodies of her friends one final look before moving to join Sombra and Twilight at the door.

A green aura surrounded the door, easily enveloping the dim, golden glow emanating from it. The lock gave way with a faint click before the door swung open, bathing the hallway in a blinding white light.

When the light faded, the trio found themselves not in a blood soaked hallway, but instead amidst a rolling field of white flowers. Stretching out as far as the eye could see in all directions. Far off in the distance stood a mighty oak tree, bathed in golden sunlight.

Rainbow Dash looked around in confusion. “Where...are we?”

“This place feels...strange.” Twilight said after a moment.

She looked towards Sombra who raised his head and sniffed the air, growling slightly as he did so. “This is another dimension.” His eyes flashed a bright red. “The Alicorns created a pocket dimension.”

“Ok so...what does that mean?” Asked Rainbow Dash. She glanced to Twilight who was lost in thought.

“What's the purpose?” Twilight asked nopony in particular. She looked up at the clear blue sky above. “Why waste energy on such a thing?”

“Because it was necessary.” Replied a celestial voice.

There came a bright flash from above, drawing their eyes skyward. Two beings, one of sunlight and the other of starlight, slowing descended to the earth. Their majestic wings spread out behind them, enveloped by their ethereal manes flowing unchecked despite the absence of wind.

The pair alighted upon the ground. Celestia, head adorned by a open face helm, set with a golden crown, ablaze with flame, focused her purple eyes on her former student. “Everything we have ever done has been necessary.”

Twilight sneered at Celestia words. “Necessary?! You would call manipulating ponies for centuries necessary?”

“Silence, Monster!” Answered Luna, her single teal eye burning with anger from within a full face, midnight blue helmet. “You have no right to speak ill of us when a city lies in ruin because of your selfish desire for power!”

“If your precious city meant that much to you, why didn't you aid in its defense?” Asked Sombra, smiling viciously as Luna took a threatening step forward only to be stopped by a raised armoured hoof.

“You must understand.” Continued Celestia, never once removing her eyes from Twilight. “We never manipulated, merely guided.”

Twilight let out a short bark of laughter. “That's the same thing in my eyes.” She gestured to herself. “You tried to ‘guide’ me to my death, only to make the gravest mistake of your existence.”

“I sent you into the Crystal Empire to learn and grow, both as a pony and as an individual. I believed you were already strong enough to resist any temptation and overcome any obstacle. That you were so easily seduced by Sombra’s evil is a clear indication that you weren't ready.” Celestia's stern expression changed to one of deep sadness. “I have failed you, Twilight.”

Celestia closed her eyes as a single tear slid down her face. “I will do what I must to right my past wrongs.” Her horn began to glow softly, shimmering off her pure white armour, as it steadily grew brighter. Once it had grown too bright to look at, it darkened into a long, gilded spear and shield.

The newly formed weapons floated to Celestia’s side, wrapped in her golden magic as she reopened her eyes, fierce determination within them. “I pray you will forgive me.” She said, leveling her spear and charging forward with all the speed of a lightning bolt.

Twilight was faster.

A wall of writhing shadows erupted in front of Celestia, catching the tip of her spear. She blasted the wall apart with her magic and swung her spear upwards to stop the flaming Crimson blade while simultaneously using her shield to block a magic green beam, fired by Sombra.

Rainbow Dash vanished in a puff of shadow, avoiding the magical knives that passed through the air she had once occupied and rematerialized next to Luna who had conjured the magic knives. She cut down three such knives with her sword before thrusting the blade into Luna exposed side, only to have a golden shield block her attack.

Her attack halted, Rainbow dropped to her stomach as both Twilight and Sombra leaped over her prone form, swinging identical Crimson crystal scythes.

The shield stopped Twilight's scythe, causing her to hiss in anger. While Sombra’s was caught on the shaft of Celestia’s spear. They remained thus for an agonizing second before Twilight grabbed the shield within her magic and pushed with all her might.

Celestia cried out in surprise as her magic was overwhelmed and her shield slammed into her, throwing her off balance. Luna maneuver around her sister's body and lashed out with her magic in an attempt to buy her sister time to recover.

She succeeded but failed to stop the blast of dark magic which tore into her side, disintegrating metal and flesh. Luna staggered back from the impact, her face twisted into a pain filled scowl.

Galvanized by her sister's plight, Celestia’s eyes became flushed with power. A dull thud sounded before a large wall of golden magic erupted from her horn, blasting the combatants away.

Gaining a moment's respite, Luna cast a quick spell sending cooling magic over her wounded side. With a flash, she was healed though her armour remained damaged.

“Are you alright?” Asked Celestia, not daring to take her eyes off the dark trio who had already recovered. Luna likewise was watching them intently. “Fine, sister.” She risked a quick sideways glance. “Are you still certain of this?”

Celestia shook her head slightly. “No, but there is no alternative.”

Luna continued to look at Celestia. “Sister, I...”

“I know, Luna.” She said, sadly as a single tear slid down her cheek. “I know.”

Not a stone's throw away, Twilight and Sombra were scowling while Rainbow Dash stood aside, sword at the ready.

“They are plotting something.” Stated Sombra, glowing eyes narrowed at the two goddesses.

“Ok so what's ‘our’ plan?” Asked Rainbow Dash.

Twilight took a step forward, flourishing her scythe. “We kill them. Slowly.”

Sombra hissed loudly, likewise stepping forward. “An excellent plan, my dear.”

Without warning, the two suddenly rushed forward with Rainbow following immediately after. Scythes and sword at the ready with magic charged in their horns. The trio reached the Alicorns in an instant. Celestia raised her shield, charging her horn with a defensive spell while Luna vanished in a flash of blue light.

Sparks erupted into the air followed by a sickly green flash as the three crystal weapons bit deeply into the golden shield, rending it asunder and destroying the magical shield simultaneously.

Celestia cried out in both surprise and pain as the resulting magical shockwave following the violent dispelling of her spell sent her hurtling backwards, tearing up a long stretch of the field before coming to a rest amidst a smoldering pile of earth.

Wincing sharply as the pain throughout her body threatened to overwhelm her, Celestia managed to raise her head just in time to witness Twilight and Sombra materialized from shadow to stand over her.

“How does it feel, Celestia?” Sombra asked, smiling darkly down on her, eyes glowing brightly. “To be bested?”

Celestia met Sombra’s gaze with a hint of a smirk. “You know all too well.”

She managed a pained laugh at seeing the look of anger on Sombra’s face but it was quickly cut short as Twilight forcibly pressed a hoof into her chest with enough force to shatter armour and bone.

Celestia cried out in pain.

Alighting just behind Twilight, Rainbow Dash worriedly looked around. “Hey Twilight, where'd Luna go?”

Twilight answered without turning from the fallen goddess. “Gone.”

“She has fled, Shadowbolt.” Interjected Sombra, briefly glancing towards her as he slowly circled Celestia.

“We’ll deal with her later.” Said Twilight. “For now...” She pressed her hoof harder causing Celestia to cough up blood. “There is something I have been waiting to do.”

“Savor every moment..” Said Sombra, coming to a stop by Celestia’s head. He leaned down and extended his tongue to lick the blood from her chin. “Its sure to be satisfying.”

Celestia inhaled sharply. “Luna...was right.” She gasped.

Twilight pressed harder. “About what?!”

“You are a monster.”

The sky suddenly flashed a terrible Crimson red as a dull rumble sounded far off in the distance, quickly growing closer.

“What was that?!” Rainbow Dash asked worriedly, glancing to Twilight.

“This dimension is collapsing.” Answered Sombra, voice dripping with anger. “We must go, quickly!”

Twilight looked to Sombra with barely contained rage. “She must die first.”

“Uh...guys?” Said Rainbow, pointing off into the distance.

The blatant fear in her voice caused both Twilight and Sombra to look in the direction she was indicating. Sky and earth, both were unraveling. Solid matter pulling itself apart to vanish into nothingness, nothingness that was quickly approaching.

“We are out of time!” Shouted Sombra. He and Shadowbolt rushed to Twilight's side and placed a hoof on her each of her shoulders as green magic enveloped them.

A pained smile crossing Celestia’s lips was the last thing Twilight saw of that doomed dimension as Sombra’s magic carried them far away.

They materialized inside Canterlot Castle at the heart of the Solar throne room. Outside the skies were still dark and rain beat heavily against the cracked windows. Around them lay the mutilated corpses of several dozen Royal Guardsmen.

Freeing herself from their grasp, Twilight rounded on Sombra and delivered a powerful slap to his face. “How dare you!” She said, voice threatenly low as blood dripped from her iron vambraces.. “How dare you!”

Rainbow Dash raised her hoofs defensibly. “Whoa easy Twilight.”

“Shut up!” Shouted Twilight as she glared at Sombra who held his ruined face. Rainbow hesitated before shaking her head and turning away.

Sombra sneered in response as black tendrils repaired the bloody gash on his face. “The Alicorn meant to trap us.” He said once the damage had been healed. “We needed to leave before the way was shut!”

Sombra snarled in pain when Twilight struck his left foreleg, breaking it cleanly at the knee. Another strike did the same to his right and unable to hold his weight he slumped to the ground only to be supported by Twilight's hoof at his throat.

“You and I both know that nothing is impossible.” said Twilight moving her face mere inches from his own. Her tone became softer but no less threatening. “Don't ever disobey me again. I would hate to have to piece you back together everytime I wanted to make love.” She kissed him gently where the gash had been. “Are we clear?”

He smiled darkly. “Crystal.”

She smiled back. “Good.” The sound of bones cracking back into place filled the room as Sombra’s legs readjusted themselves. Upright once more he bowed low to Twilight. “Shall we?” He asked, extending a hoof to Twilight, who took it eagerly. “Let's.” They made to take a step when Twilight suddenly stopped. “Oh I almost forgot! Rainbow?” She said, looking towards Rainbow Dash. “Why don't you grab Arctic and head back to the fortress while we finish up here?”

Shuffling wings and a curt ‘fine’ were her only answers before Rainbow vanished in a puff of shadow.

Twilight smiled malevolently. “Now then...”

Hoof in hoof, the pair began walking towards the throne room doors. The bodies that lay in their path glowed a sickly green before jerkily rising to their hooves. Thier limbs creaked and groaned as the risen soldiers formed into two rows and saluted the pair as they passed.

“Hail King Sombra! Hail Queen Twilight!”

“Hail the Void Masters!”

The rain was cold. It drummed endlessly against the stone, pounding and thrumming relentlessly. It drowned out all sound, all feeling. The rain was cold.

Luna stood upon the highest balcony of Canterlot castle. Her armour laid scattered around her, forgotten amidst the rain, her royal vestments were likewise tossed aside. Only a silvery strip of cloth covering her right eye remained. She craned her head towards the sky, letting the rain join with the tears streaming unnoticed down her face.

They knew they could not hope to win against Sombra and Twilight, powerful as they were and supported by the abomination that was Rainbow Dash. So a plan was formed, lure them into a pocket dimension and seal them in forever. A risky plan, costly as well. Every moment used to prepare the necessary rituals to construct this prison was paid for by those ponies left at the mercy of those monsters.

But it was all in vain.

Luna closed her eye tightly against the rain as fresh tears flowed. “Sister...my sister...”

In the end the prison was completed just as the darkness closed around them. Yet it wasn't without its flaws. It could only be closed from the inside. She had begged and pleaded for her to be the one, but she was refused. ‘Once already you suffered for my sins. Never again.’ She was told in the moments before the battle. Thus she was sent away, leaving the one she cared for most to face this evil alone.

“We were fools.”

Spent, Luna leaned against the railing and waited. She could sense their presence, as they could sense hers. It would not be long.

The rain stopped.

The sudden silence was near deafening. Summoning what remained of her strength, Luna pushed away from the railing and turned, head held high.

Twilight and Sombra stood at the entrance to the balcony, hoof in hoof with shared smiles on their faces.

“Finally!” Snarled Sombra. He removed his hoof from Twilights and threw it forward. Green lightning erupted from his hoof to electrocute Luna.

“AHHHHH!!!”

Luna cried out in pain as the Lightning coursed through her body. The silver cloth which covered her eye ignited, burning away to reveal the black crystal embedded within, now glowing green as they absorbed the Lightning.

Sombra smiled as Luna was driven to her knees by the onslaught of dark magic. “I've waited over a thousand years for this moment.” He said as he moved to stand over Luna, still channeling lightning into her body. He lowered his hoof as the Lightning ceased leaving Luna panting heavily on the ground, smoke slowly rising from her fur. Taking a step back,, Sombra extended a hoof towards Twilight.

“Ready, my Queen? Sombra asked, taking Twilight's hoof and pulling her into an embrace.

“Yes, my King.” Answered Twilight. Together they looked towards Luna, channeling dark magic into their horns, and raised their hooves.

With a flash, Luna’s body exploded, drenching the balcony in blood and pulp.

Wiping blood from her eyes, Twilight looked towards Sombra and smiled, gently stroking his face. “At long last. We are victorious.”

“Yes.” He said, drawing her into a passionate kiss.

“At long last.”

Author's Notes:

An abrupt ending, I know.

I plan to fix this in the next full draft.