In Canterlot, everything had devolved into a form of chaos that would make a unreformed Discord proud. Buidings burned from Celestia's spell fire as she made her way towards the Castle and her target. There was fighting in the streets, and it was Royal Guardsman against Royal Guardsman. Celestia, as her first act had taken control over half of Nightmare's forces for use as a makeshift army to conquer the rest of her soon-to-be kingdom. That is, if the resistance didn't have anything to say about it.
Canterlot Town Square
"Alright you lot, I don't want to hurt you but you're leaving me no choice." Boltstrike muttered and pulled out his rapier as he was surrounded by some of his own men controlled by Celestia.
"Last warning before I show you what for!" Boltstrike yelled but got no response. No good ones anyway.
"So... That's what it'll be eh?" Boltstrike murmured before reciting a poem. "A commander alone, a sun on the rampage while a city burns and no end in sight." He uttered before his mind controlled men charged towards him. A stallion pinned Boltstrike down and held a knife to his throat but Boltstrike kicked him off his form. A second guard tried to take him from behind but Boltstrike was soon on his feet once more and kicked his attacker into a market stall.
"I should lecture you on your poor form, but what's the point? You probably wouldn't listen anyway would you?" Boltstrike asked sarcastically.
The remaining two guards stared him down and Boltstrike stared back not even blinking. The first came at him sword in mouth but Boltstrike raised his own blade to block it before giving his rapier a twist and his opponent's sword went flying out of his mouth and landed nearby. The now weaponless guard tried to attack only for him to earn a hold from Boltstrike which knocked him out after depriving the guard of his air supply. The final guard attacked and Boltstrike and him fenced for a few moments till Boltstrike kicked a wooden barrel at his foe and knocked him out.
"You forget, I trained you all. I may normally be a pacifist but let's not forget. I'm the Captain of the Royal Guard for a reason!" Boltstrike roared. "Now, if any more of you want me... Come and get me!"
As if to answer his request, several more mindcontrolled guards came across a bridge but suddenly a lightning bolt struck the bridge breaking it in half and sending the guards tumbling into a river. Boltstrike looked up, only to see a blond maned Pegasus guard with odd eyes wave at him and grin sheepishly from atop a cloud.
Castle of the Two Sisters...
"It's... It's over. We've lost. We've all lost." Twilight repeated sorrowfully while shaking her head in guilt. She hadn't meant for it to get this far. Sure, she wanted revenge against Nightmare but not like this, not for a insane Alicorn to go after her. And now the whole world was about to live forever in the daylight and get scorched in it's power.
"No, we haven't lost. Not yet, not while I still breathe." Starlight growled and began to trot towards the direction of Canterlot. Twilight ran after her only for Starlight to glare at her harshly.
"And where do you think you're going?" Starlight snarled in Twilight's face.
"I'm... I'm trying to help." Twilight whispered sadly as a tear rolled her down her face.
"No, you've done enough." Starlight replied but Twilight glared back at her. She wasn't going to give up that easily.
"No, I haven't." Twilight snapped. "Listen, even if you and your friends tried going after Celestia she'd still overpower you. You need help, and you know it. So for Nightmare's sake let me help you. I caused this, and now I'm going to help end it no matter what the Tartarus you say!" She yelled before her expression softened.
"Please..." Twilight whispered. "Please, let me help."
Starlight then made up her mind...
Canterlot Castle, Throne Room
KABOOM!
The wooden doors to the throne room burst open and were rapidly splinters thanks to a powerful blast of magic from the Solar Tyrant. Nightmare jumped off her throne and to the floor which cracked as she landed to meet her sister, whose eyes were ablaze with a horrible blinding light like that of a solar flare gone wild.
"Well now, it has been a long time now hasn't it?" Celestia sneered.
"Not long enough." Nightmare replied simply before firing off a spell at her sister who created a shield to stop it. "You're going back to the sun."
"Not this time sister." Celestia laughed. "You, however are going to the moon just so you know how it'll feel." She snarled before blasting Nightmare into her throne reducing it to rubble.
"The day will last forever. Crops will wilt, streams will turn dry as bones and ponies will embrace the light!" Celestia cackled before Nightmare ripped off a pillar with magic and launched it at her sister but Celestia blasted it into rubble only to be knocked to the floor by another spell from her sister.
"Even if you defeat me, other ponies will rise up to stop you. The Elements will-"
"Damn the Elements!" Celestia snarled. "My own will counteract them. Nothing can stop me now, not even you... Actually, on that subject. What if it was you, what if things were reversed? I'm sure I'd have done a better job then you ever did."
"Well, we'll never know will we?" Nightmare replied sarcastically only to for a spell to make her slide backwards back into what remained of her throne. She tried to get up, but found she didn't have the strength to do so. The battle was over, and she'd lost.
"Yes, that's right... We'll never know." Celestia sneered as she advanced...
Canterlot Marketplace
Elsewhere in Canterlot the battle was not going well with the few non-brainwashed ponies rapidly losing ground against their brainwashed foes. In the Marketplace, a group of Celestia-controlled guards had cornered Aristocrat Fancy Pants and his wife Fleur.
"Please... Don't!" Fancy pleaded but of course there was no answer. Then, there came a shout from somewhere nearby.
"You know, you kill those innocents and you just might make me cranky. And believe you me, you don't want to see that!" Discord called as he leaped down off a rooftop alongside Sombra who was a bit less confident but didn't let that stop him. Their foes turned their swords from Fancy and his wife to them.
"Oh yes, brilliant idea. Now we've got the swords pointed at US!" Sombra said sarcastically but Discord wagged a finger at him.
"Now now, no need to panic and get all sarcastic on moi. I've got a plan, perfect to break the control." Discord laughed as the guards advanced.
"Yeah? Well, you better think of it fast..." Sombra said nervously.
"See, I know Celestia, the old bat, is whispering nasty old things in their pure virgin ears so I intend to replace that voice in their heads with something even worse! That is, the most annoying song EVER put into words!" Discord said confidently before bursting out into a rendition of "It's a Small World" forcing Sombra to cover his ears. But the ploy worked, and the guards were free.
"Now we just have to do that to everypony else! What fun!" Discord crowed. His partner was less pleased.
"Great..." Sombra muttered.
Canterlot Castle, Throne Room
Celestia with a insane smile stood over her defeated sister who was panting hard and bleeding in several areas from the wounds she's sustained.
"Mercy... Please. Listen to me Solar, you've got to be in there somewhere! Fight it!" Nightmare pleaded but it was no use.
"Mercy? Where was mercy when you imprisoned me in the sun!?!" Celestia roared in fury.
"I... I had no choice." Nightmare said sadly. "You had to be stopped."
Her sister laughed bitterly.
"Well, you certainly failed at that didn't you? Oh, what's that phrase the kids use today...?" Celestia wondered aloud before she "remembered" and got in very close to her sister's face and sneered. "Oh yeah, that's right. Sucks to be you. Buh-bye."
Celestia charged up her horn with a spell to finish off her sister at last. But just as Nightmare closed her eyes for what she thought would be the last time and braced for death, a angry voice came from behind them and both Alicorns whirled around to face it.
"HOLD IT RIGHT THERE CELESTIA!" The voice yelled. Suddenly a figure stood in the ruined doorway. There was a widening of eyes from Nightmare and Celestia.
"So my teacher stands alone." Starlight said, and both Nightmare's and Celestia's eyes widened even further at who joined her.
"Not alone, no." Twilight commented, her horn ablaze with magic. "Time to end this."
(To Be Continued...)