Midnight Sparkle's Final Battle

Sunset Shimmer awoke after being knocked out for a while. The last thing she remembered seeing was Twilight's transformation into her twisted other self, and the last thing she heard was the laughter of her enemy, Midnight Sparkle.

"S-Sunset? Is that you?" a mysterious voice called. Sunset got up to turn around, and saw the figure of an equine being with a long, pointed horn, two large wings and a long, benevolent mane. Sunset recognised this figure immediately as Princess Celestia of Equestria.

"Princess Celestia?! But...HOW?! How come you haven't changed form." Sunset asked in shock and awe, having not seen the Alicorn for quite some time.

Celestia looked at the chaotic scenery around her, then turned back to her former student. "This world's Twilight Sparkle has destroyed the barrier between our worlds. Now, humans and equines can interact with one another without them changing their physical appearance."

At the mention of Twilight's name, Sunset's expression turned to one of anger and sadness. "That isn't Twilight...not anymore. There's only Midnight Sparkle now."

Meanwhile, Midnight looked around her with a madwoman's grin streaking across her face. All around her, ponies and humans were running screaming in fear, trying to get away. Since barriers had been broken, and after manifesting her strength within Twilight, she was able to take on new magical strengths and map them onto whatever she chose. With that, she generated a large magical dome, sealing everybody and everypony inside of it. She could take all the magic she wanted to, and could rule both worlds with a terrifying ease.

"There's no time now! She's beginning to drain the magical energies from my subjects, I CANNOT let her get away with this!" Celestia cried out as she flew up to the now-corrupted Twilight. "Midnight Sparkle, you have to stop this!"

Midnight looked at Celestia, the purple pupils of her eyes having shrunken down to the point where she could be seen as clinically insane. She reached out a hand to Celestia, stroking her mane as if she were a pet. "Awww...aren't you a pretty little pony?" Midnight said in a sinister low tone, which unsettled Celestia, who flew out of Midnight's grasp. Celestia charged some magic into her horn, causing Midnight to reel backwards in wait, to see if the magic would do anything. Sure enough, it did, blasting the demoness in the face. Celestia grinned, believing she stalled Midnight enough so that she could rally her castle's guard.

Midnight, however, was merely distracted. "So, pretty pony wants to play rough, huh? I'LL SHOW YOU TRUE POWER!" Midnight's horn began to pulsate as her hands began to glow blue. Celestia looked back in fear as Midnight brought her hands together to form a large magic beam that was aimed right at her. She tried to fly away, but Midnight's eyes were locked onto her, and the beam slammed into her with a perfect accuracy. Celestia was sent into the ground with a large explosion, as Midnight trailed the beam along her in a circle, creating a wall of flame around herself.

Sunset rushed over to the wounded Celestia. "Are you OK?" Sunset pulled Celestia out of the pit Midnight had forced her into. "Please Celestia...we need your help..."

Celestia coughed before uttering the words "You must...find...the crystals..."

Sunset looked confused as her friends rallied around "Crystals?" she asked, wondering what Celestia was talking about. "Celestia, what crystals are you talking about?"

"This world contains seven crystals, very much like Equestria's Elements of Harmony. If you gather them, you may be able to defeat Midnight and restore your world's Twilight to normal" Celestia spoke, before getting on her four hooves and walking the other way. "I must help my subjects." Celestia then left to a group of ponies cowering away from Midnight in fear.

"So, we need to find these crystals to save Twilight?" Pinkie Pie asked, while simultaneously eating a s'more.

Sunset nodded, and turned to her friends. "Well, I guess we have some magical crystals to find so we can restore the barrier between worlds and defeat Midnight Sparkle!"