After receiving advice from his dark Alicorn general, King White Magick began to march his troops west through the Everfree Forest for roughly a half an hour until his general suggested they turn south towards the edge of the forest. Given that they were fairly close to Ponyville when they began their march west, White Magick figured that they would be far enough to the west that Twilight, unless she were scanning the world, would not see him duplicating his troops nor would she see them marching into town until the last minute.
Once they got out of the forest they looked off to the east and while they could see Twilight's tower as a faint speck on the horizon, they could not see any of the rest of Ponyville. White Magick looked over his troops, especially towards the ordinary dark Alicorn and changeling soldiers, pointed his hoof to the right and ordered, "Soldiers, I need you to stand over there so I can begin the duplication process."
The four soldiers headed out into the open as they knew that with as many times that they would need to be duplicated, they would need plenty of room. Once they gathered together and White Magick figured there would be enough room for what would become a vastly larger army, his horn began to glow white and he recited, "From one to two, two to four and so much more, when one is simple mere, more and more shall appear."
He continued to cast the spell until he had nearly 4,100 troops. He figured that since he also had 300 unicorn soldiers, that he wouldn't need to create another 4,000 troops that would need to be fed. He looked over his much larger army with a smile. He pointed his hoof off to the east and ordered, "Alright troops, to war, to victory!"
In Ponyville Twilight had just cast a new loyalty spell on all her troops, causing the ones who were beginning to question her to stop and those who were still extremely loyal to her to become even more loyal. Despite being hungry and thirsty, every single one of her soldiers along with her friends were ready for the enemy to arrive.
Twilight was looking out at her forces and could tell that they were still curious as to when White Magick and his forces would arrive and she figured that she should address that. She began, "Troops, I know you're upset about our enemy not arriving here, I know you're upset about not having much in the way to eat or drink but I have a feeling that our enemy is not too far away now. I can sense them approaching us."
All her forces turned to the east and Rainbow asked, "So Twi, will they be approaching from the east or do you think they may try and trick us? Do you think maybe they circled around Ponyville and might be approaching from the west?"
Twilight was not thrilled by this question as she took it as being questioned in a negative way. She snapped, "No Rainbow, I know they're coming from the east. If they were coming from the west I would know it." She raised her voice and continued, "You should know that your dark goddess would know which direction her enemy is coming from!"
This frustrated Rainbow as that was not always the case. She asked, "Twilight, what about back when Colgate's forces caught us off guard? You thought they were coming from the west but they circled Ponyville and came from the east so you never know, that king of theirs may have done the same thing."
This sent Twilight into a rage. She yelled, "Oh so this is how it's going to be huh? You're going to be a disloyal brat just like Rarity huh?" Before Rainbow could say anything further Twilight's horn began to glow black as she recited, "You have committed treason and that is not in season, you are a threat to me and I simply can not let that be, I can no longer be annoyed so you shall be cast into the void."
As soon as her energy hit Rainbow, a black vortex opened up and swallowed her. Everypony, especially Pinkie, was in shock that she would not only do that to one of her friends, but one of the two last regular Alicorns that she had in her forces. Pinkie gasped, "Twilight, how could you? She is your friend!"
This angered Twilight further. She screamed, "You too Pinkie?" Her horn began to glow black as she recited, "You have committed treason and that is not in season, you are a threat to me and I simply can not let that be, I can no longer be annoyed so you shall be cast into the void."
Once her energy struck Pinkie, she too was swallowed by a black vortex. Twilight glared out at her forces and yelled, "Anypony else going to piss me off? Anypony else want to go to the void?"
Her soldiers stood there in a nervous silence until in unison they shouted, "No ma'am!"
Twilight replied, "Good, I don't feel like having to......"
Before Twilight could finish her sentence she heard a yell, "CHARGE! TO WAR! TO VICTORY!"
Almost immediately dark Alicorns and changelings came flying in from the west. Twilight yelled, "We're under attack! Take them out, cover their king and soldiers in ooze!"
White Magick heard this and yelled, "Take her soldiers out, cover her and her Alicorn friends in ooze!"
Both armies' dark Alicorn soldiers and changelings were very agile and were able to escape hits from opposing forces but the same could not be said about White Magick's unicorn soldiers. While they were able to take down some changelings and dark Alicorn soldiers, it didn't take long for all three hundred of them to get covered in ooze. When Twilight saw this she couldn't help but smile but she had more pressing matters to deal with, her nemesis, King White Magick.
Several minutes into the battle, Twilight finally ran into her nemesis. She pointed down at his unicorn soldiers and laughed, "Ha, your precious little unicorn soldiers are covered in ooze!" She fired energy at White Magick and struck him, prompting her to laugh, "Bow down to the Dark Goddess Twilight Sparkle and she might let you live! Pay her the tribute you owe her and she'll let you return home!"
This angered White Magick greatly but he couldn't help but remember the words of his wife ringing in his head. He was facing off against an incredibly powerful yet corrupted mare but knew that it would go against everything his kind stood for if he was to try to kill her. Instead he yelled at his changelings, "Cover her in ooze! Take her down!"
The changelings quickly began to swarm around Twilight while White Magick began taking out Twilight's changeling and dark Alicorn soldiers. For quite some time, Twilight was having no problems handling the opposing changeling and dark Alicorn soldiers until a couple changelings attacked from behind her and began to cover her in ooze. As she began to have trouble flying and using her magic she yelled, "Free me you idiots, free me from this ooze!"
Unfortunately for Twilight, her dark Alicorns and changelings were being brought down at a rate quicker than their foes were as Blue Star was very accurate with his shots. Finally Twilight became covered in enough ooze that she fell to the ground. The rest of the battle went by rather quickly because without Twilight, her forces were taken down quickly and soon all that remained were White Magick's soldiers.
Once the battle was over the first thing that White Magick and Blue Star did was free the unicorn soldiers from the ooze they had been covered in. Blue Star and White Magick looked at their surroundings and were happy to see that only a couple buildings had sustained any damage and even that was only minor. Soon though they would focus more on the last remaining enemy alive, an angry Twilight Sparkle screaming in a rage.