Full Metal Pony

Fluttershy saw it all happen. From Rarity talking down Chrysalis, to her being impaled, and dropped at their feet, gasping for air, blood gushing steady. Everything around her stopped as she watched her dearest friend fall to the hands of death. She had her tools ready, but by time she reached her, the lifted had left her completely. Unresponsive to anything she tried; Fluttershy broke down and cried softly on Rarity's body. She said a few words no pony actually made out and shut her eyes, leaving her in peace. Every pony’s eyes were on the scene. Queen Chrysalis, Princess Luna, a few royal guards and the mane 6. It was almost peaceful in the midst of the changeling queen that had just maimed one of their best friends, when, from a doorway, a beam of pure white energy shattered on Chrysalis, sending a gush of blood spattering across everything near her, the majority in Rarity's body, turning the red blood into a rotting grey mixture. Luna whipped around, and saw Princess Celestia sanding there, donning her special made armor, her eyes fixed on the direction that Chrysalis flew. "I want you girls to stick with Luna and clear out the castle grounds for reinforcements. Colgate, Angel, yo-" she was cut off by a changeling landing between Colgate and Angel Kidd, and changing into a black earth pony before her. "My name is Neo. Yes, I’m a changeling, but I despise my race and was enlisted by your group to fight Chrysalis and her army. That's all you need to know about me." Neo said sternly, with a glare towards Celestia. Shimmering Leaf was comforting Fluttershy. "No, you see, I will know whatever I demand to know about you. Later, that is. You, Colgate, Angel and Shimmering Leaf are tasked with defending the main hall with my royal guards and Luna’s lunar guards." Celestia commanded, walking with Luna to the cloud of rubble where Chrysalis lay. Luna was setting off, the mane 5 in tow, when a deafening roar startled every pony, and a dark figure emerged from the rubble. "Girls, get out NOW!" Commanded Celestia and she stepped back and charged a spell. Luna and the five raced out to a balcony overlooking the palace grounds. And they stared into the sea of black.
"Those are all changelings!?" Dash exclaimed, jaw open wide. "Not all of them... you see that small group approaching the changeling platoons? Those are the Twisted. Horrible creations caused by the mixing of blood from the dead body of a pony with the blood of a changeling. Half the brain is pony and the other is changeling, and either side can take over." Neo explained. "That means that some of them are more pony then changeling?" asked Luna, making sure she understood. "Yes, exactly." Neo said, softly. "Rainbow, do you still have those sonic rain bombs?" asked Twilight, her eyes never leaving the sea of changelings. "Yeah, would this be a good time to use them?" she asked, spreading her wings for flight. "Well, it would definitely help clear them out. If you climb up, ma-" her scientific plan was cut short by a rainbow, darting away towards the army below. Dash felt the hatred for what their queen did to Rarity burning strong in her heart. The wind stung her eyes, the feeling never gets old. All she had to do was pull the string and 3 bombs you’d fall from a pouch on her stomach. 'Wait for it... just a little lower...' she thought to herself... 'NOW' her mind screamed, and she yanked the string. Feeling the tension from the string loosen, she looked down to see 3 small objects fall to Earth, and explode and a glorious ball of fire and smoke. Limbs were blown off, and the host's body was ripped and torn by the concussion into bone dust and charred hunks of grey flesh. Screams erupted. Screams of pain, screams of fear. Dash wanted more, more to pay for the pain of watching Rarity impaled in front of her. She had remained mostly silent; she was in shock. The payback in this devastating form was only the beginning, she thought, and pulled back up to the others. When she landed, Pinkie had het artillery cannon loaded and aimed at the army. Luna lit the fuse, and they watched the fuse shrivel away and disappear into the cannon. Seconds later, the world seemed to shatter with a crack, and puff of smoke. The shell hit the ground, causing the same effect as the rain bombs, but on a much larger scale.
They laid waste to them from above, Dash used the crossbow, Luna and Twilight cast spells, and Pinkie cannoned everything she could. At the same time, a battle was raging just behind the closed doors between Celestia and Chrysalis. Celestia seemed to never run out of spells to cast, but Chrysalis had a few tricks waiting for her opponent. She shifted into a snake, and slithered up Celestia's leg and under her armor, biting her in multiple places along the way. She curled around the tip of Celestia's horn, and help on tight. Celestia shook the snake off, and Chrysalis turned back into their changeling form, but something was missing. "Missing something, are we?" asked Chrysalis, levitating something up to Celestia. In the shaking of her head, almost all her horn came off with Chrysalis. Celestia was confused, mostly, and it didn’t help then Chrysalis body slammed Celestia, knocking her helmet off. She looked up, and Chrysalis was rearing up, and moments later she brought one of her front hooves directly down on Celestia's skull, smashing it in area. She ripped her body armor with the fangs she had, exposing her vulnerable stomach. Celestia was near the point of passing out, blood trickling into her eyes and sleeping into a pool forming around her head. Chrysalis's horn started to glow, and Celestia's legs were pinned to the ground, leaving her completely helpless. "P-please.... don't" she begged, slowly lifting her head. But it wasn't Chrysalis she was talking to.

Princess Celestia saw her, standing behind Queen Chrysalis, holding jewel blade, the yellow pony with the pink mane, so shy, so tame, but with a bright determination in her eyes. She slowly lifted herself a few feet off the ground, just high enough to hit Chrysalis with the sword.

Fluttershy knew what she was doing was almost suicidal. But what Rarity had done for them... this seems almost mandatory. She closed her eyes, and remembered the feeling of pain that crashed over her knowing she was just seconds too late. The words she had wanted to say, that never were heard by her ears. That’s when she remembered what she was doing.

Queen Chrysalis noticed a small, yellow movement in the corner of her eye. Turning around, she recognized the small yellow Pegasus as the medic of the 6 girls, and the one that took Rarity’s death the worse. She had her eyes closed, and tears began to form. She stared straight at her, until she opened her eyes again, wide with fear. Then the world seemed to be sucked into a black hole, dark as night, but glowing with shadows.

Then there was the void.