While Rainbow Dash was flying to the Castle of Friendship, she couldn't help but think of another memory as she was flying.

"Rainbow Dash."

"Yeah Twi? What's wrong?"

"I'm sorry to say this, but I have decided that you are too much of a hassle. So I've decided to kick you out from the Elements of Harmony and from our friendship."

"W-WHAT..? Twi.. What did I do?!"

"Everything. From the way you are, to being a self right entitled cunt. It's final. You can't change anything, as it is my decision, the Princess of Friendship. So pack your belongings and get the fuck out of here. You have ten minutes."

"You can't kick me Twilight... We've been through so much stuff.. Remember..? When I caused you and the others to get your cutie marks and meet each other...? When I helped you to fly when you first became a Alicorn..? When you helped me to take the Wonderbolts exam...? Besides... Aren't I the Element of Loyalty..?"

"Just SHUT UP and go pack your belongings before I decide to kick you out right now."

"Why... Why Twilight..."

"And also, from this day forth, you are no longer the Element of Loyalty. It doesn't matter. We will find a replacement for you. You are easily replaceable, unlike me and the others. Now get out."

"I can't believe you Twilight..."

After remembering the old memory, Rainbow Dash's expression changed to a menacing scowl until returning back to her normal insane expression. Two minutes later, she arrived back in front of the Castle of Friendship.

"I won't let that memory go past me. I WILL SHOW HER how she made me feel that day she kicked me out." Said Rainbow Dash furiously.

"Alright. Here we are again, at the Castle of Friendship. Time to hatch my revenge against Twilight. But how am I going to get inside without alerting her...? If she knows I'm trying to kill her, she will make no effort to kill me on the spot with her magic. I might have no choice but to break in..." Said Rainbow Dash while thinking of a solution.

Rainbow Dash then got a idea. A idea so clever it made her smile sadistically. She knew that Spike must be in the Castle of Friendship. Whether he was asleep now or not was unsure, but it was clearly worth a shot. Rainbow Dash brought out the best of her imitation of Rarity in her voice before initiating the plan.

"Oh Spikey wikey~ I have a invitation for you to come spend time with your favorite fashionista in Carousel Boutique! It will only be you and me there!" Said Rainbow Dash in her imitation voice of Rarity.

And surely enough, somehow, it actually worked. She could hear small feet getting up and running towards the door before opening it from inside. Before the door opened, Rainbow Dash flew up to the tallest area in the door to prevent Spike from seeing her. As soon as the door opened, she flew inside as Spike made no haste to run over to Carousel Boutique with hearts in his eyes.

"I'm coming Rarity!" Said Spike while running.

"Freakin' creep." Said Rainbow Dash, before flying down to the ground inside the castle and closing the doors.

She was finally inside the Castle. She had to waste no time to kill Twilight incase Spike would end up coming back early. She made no haste to fly up the stairs in the back of the entrance hall towards the second floor and then towards Twilight's bedroom. When she reached the door to Twilight's bedroom, she started to think of a sinister plan with the least chance of failure.

"Alright. Here is the door to Twilight's bedroom. I need to think of a plan to distract her. I could just sneak in and bash her horn off, but that is too risky.. I could open a door and then her door and hide behind the other room's door as she comes in, and then strike then, but once again, that's too risky..." Said Rainbow Dash while plotting.

As Rainbow Dash thought of a safe plan for killing Twilight without alerting her before breaking her horn, she thought of a amazing idea finally, one that made her smile sadistically once again.

"If I kill her stupid owl, she would be distressed and distracted. That's the best chance to strike at her. But then again.. After I break her horn, I will be alerted to her for sure. She could fly away and tell Ponyville and the Princesses after that... This could take a bit of thinking..." Said Rainbow Dash while thinking, deep in thought.

"That bitch must have a vial of liquid that will slow her down or make her weak to not be able to fly away. Guess I should go off to the laboratory area in the castle. There should be lots of vials there." Said Rainbow Dash with a sadistic grin as she made her way back downstairs.

When she got back to the stairs in the main hallway, she pondered on where the entrance to the lab would be.

"It must have been around here, last I remember..." Said Rainbow Dash in confusion.

Rainbow Dash looked around on the stairs for what could be a secret entrance into the laboratory area of the castle before eyeing the tapestry on the wall. She looked at it for a minute before pulling down on it, causing the wall behind it to open up like a door. Rainbow Dash walked down the stairs of the newly opened passage which went on for at least a good two minutes. After walking all the way down, she finally arrived at the heart of the laboratory, worktables lined with computer monitors, and racks of vials, all inside the laboratory. Rainbow Dash decided to check the cabinets of the worktables for various chemical compounds needed to create something that can temporarily incapacitate her.

"Hmm.. These must be chemical compounds that the egghead uses for chemistry... Exactly what I need for my plan.." Said Rainbow Dash with a wicked smile.

Rainbow Dash looked in the cabinets for something that can make her fall asleep temporarily. Opening cabinets after cabinets, she finally opened one that had containers of premade Ammonia. She grabbed a container out along with a small towel and went back upstairs out of the laboratory. When she got back to the stairs in the main hallway, she walked back upstairs to the second floor before getting ready to hatch her genius plan.

"If I remember correctly... Owlowiscious's room is behind this door... Time to put the plan into motion... You'll realize soon enough Twilight, that you lost the best pony from your life..." Said Rainbow Dash with a sadistic grin.

Rainbow Dash opened the door slowly as to not alert Owlowiscious, who just so happened to be sleeping luckily to her. She went inside and then closed the door slowly before approaching Owlowiscious with her hammer.

"Batter up..." Said a sadistic Rainbow Dash, as she slammed the hammer as hard as she could against Owlowiscious's head, knocking him to the ground breaking his neck in the process. She finished him off by crushing his head with the hammer, causing lots of blood and bits to fly out from his now crushed head. As much as she wanted to laugh sadistically, she kept herself from doing so to not wake Twilight up too early. She made a blood trail from Owlowiscious's corpse leading over to Twilight's bedroom door.

"It's finally time to put this in motion..." Said Rainbow Dash with malice in her voice as she went back in Owlowiscious's room and put her hammer down to pick up the towel. She poured the Ammonia over the towel before laying it down behind the door. She went back to Twilight's bedroom door and proceeded to kick it with her front hoof with all of her might before walking over to hide behind the door in Owlowiscious's room. After hearing the door bang, Twilight jolted awake from bed.

"WHAT the heck was that?!" Said a shocked Twilight.

Twilight got up and opened the door. As soon as she did, she saw the blood trail and of all things, Owlowiscious's dead corpse, head smashed in. This caused Twilight to scream in horror as she runs into the room to bend over and cry over the death of her precious pet.

"WHO COULD HAVE DONE THIS TO YOU OWLOWISCIOUS?!" Said Twilight while crying.

This was Rainbow Dash's moment to knock her out as she was clearly in distress and distracted. Rainbow Dash slowly and quietly walked over to go behind Twilight, before wrapping the towel around her muzzle tightly. Twilight tried kicking back despite Rainbow Dash's tight grip.

"WHO AR- y..ou..?" Said Twilight with the last of her energy before the Ammonia knocked her out temporarily.

"SHIT. She better not have died too early, or I swear to Celestia..." Said a angry and nervous Rainbow Dash.

Rainbow Dash put her hoof over Twilight's chest to still feel her heart beating, indicating that she is still alive.

"Thank Celestia... Hehehe..." Said Rainbow Dash with a sadistic grin.

Rainbow Dash picked up Twilight and flew her unconscious body all the way back into the laboratory. Back inside the laboratory, she spotted a harness table against the wall that she probably used to cure Ponies when they were sick and needed scientific treatment. She put Twilight's hooves in the harnesses and proceeded to tighten them as tight as she could to prevent Twilight from being able to break out of the harnesses. After putting Twilight in the harnesses, Rainbow Dash proceeded to slap Twilight with her hooves to wake her up.

"W-WHAt? What just happened? Wait, WHAT?! Rainbow Dash?! What are you doing here? I thought I told you that you aren't welcome here anymore! Wait, why am I in the harnesses in my laboratory?!" Said a surprised Twilight as she tried to break out of the harnesses before noticing Rainbow Dash's sadistic grin.

"Y-you're going to try and kill me? Is that why you put me in the harnesses in my laboratory?!" Said a shocked Twilight

"Precisely." Said Rainbow Dash, still grinning sadistically at Twilight.

"You're going to have to try harder then that to kill the Princess of Friendship!" Said Twilight as she used her magic and started forcefully levitating Rainbow Dash, slamming her into the flasks in the laboratory and the edges of the worktables, causing cuts and broken glass to penetrate her muzzle, protruding blood from the cuts.

Rainbow Dash had to think of something quickly before Twilight would surely kill her with her magic. She picked up her hammer for later and pushed down the metal cart with wheels in the laboratory onto the floor to be out of the radius of Twilight's magic, making a makeshift riot shield. She proceeded to push it closer to Twilight before waiting for Twilight to lift the metal cart with her magic. Surely enough, Twilight started lifting the metal cart up with her magic. That was her chance. Get up to her quickly and break her horn off. Rainbow Dash made no haste to lunge at Twilight with the hammer in her hooves before proceeding to slam it very powerfully against Twilight's horn, fracturing and breaking her horn off of her, causing Twilight to yell in agony.

"Rainbow Dash, I SWEAR TO CELESTIA I WILL PERSONALLY MAKE SURE YOU ROT IN THE DUNGEONS IN CANTERLOT CASTLE!!" Said Twilight with pure anger in her voice before Rainbow Dash started laughing sadistically, causing Twilight to become nervous of what she was going to do to her.

"Oh Twilight, naïve little Twilight... You never learn, do you? If you really think you can stop me, you can't! HAAHAA!!" Said Rainbow Dash sadistically, enjoying every moment of Twilight being fearful of her.

"R-rainbow Dash... What's happened to you...? Did we... make this monster... out of you...? This is all our fault... isn't it...? Look Rainbow Dash... If you let me go... I swear on my life, I won't tell on the princesses, and well... We can become friends again..." Said Twilight worriedly.

Rainbow Dash while turned away from Twilight thought about the deal for a good minute before turning her head around to reply back to Twilight's deal.

"Nah! This will be fun! HAHAHA!!" Said Rainbow Dash with her sadistic grin once again.

Rainbow Dash proceeded to lift the metal cart back up from the ground before heading to one of the worktable cabinets.

"I heard once, that Fluoroantimonic acid is very lethal and can melt through anything metal, and... organic. If swallowed, it will melt through the insides of any pony.. Hehehe.... This will be very amusing to watch for myself!" Said Rainbow Dash with a long wicked grin across her face as Twilight could only listen in horror, as she pleaded to Rainbow Dash while starting to panic.

"RAINBOW DASH! PLEASE DON'T!! I'LL DO ANYTHING!!" Yelled Twilight, fully in panic.

Rainbow Dash took out two containers of Hydrogen Fluoride and two containers of Antimony Pentafluoride before bringing the containers over to the metal cart and putting them down on top of it.

"How do you even know how to make it? You don't have as much intelligence as I do!" Said Twilight while still fearful.

"Let's just say I snuck into the library in Canterlot Castle at some point in the past and found a recipe for how to make it, along with the information that it can only be inside something that's lined with Teflon, otherwise it will melt through. Also, don't think you're getting yourself out of this! You want to know how you caused me to feel that fateful day...? You made me feel like SHIT, like I didn't matter. So I started harming myself ever since you BACKSTABBED ME and twisted the blade... But this is where it's going to end for you." Said Rainbow Dash sadistically.

"I.. I see... We.. really were a monster to you... I know how you must feel Rainbow Dash... but PLEASE... DON'T KILL ME!!" Said Twilight, starting to fully panic now.

Rainbow Dash put the containers down on the metal cart and picked up a large vial lined with Teflon. She started opening the lids on the containers and then pouring the contents of the containers inside it before putting a cork inside of the top to seal the vial before putting it inside a centrifuge to the left of her on the worktable to mix the contents together. While it was mixing, Twilight tried to send a SOS pulse to Celestia with her broken horn, failing to do so due to her horn being broken off as magical sparks came out from her horn.

"Did you really think you could call your puny princess with your broken horn? HAHA!! Now that's priceless!" Said Rainbow Dash sadistically as she started laughing at Twilight.

After a minute, the centrifuge finally finished mixing the contents of the large vial together into a high quantity of Fluoroantimonic acid, the liquid being colorless now. Rainbow Dash picked up the large vial out of the centrifuge and popped off the cork from the top before looking at Twilight with her sinister grin.

"Well... It's finally time! HAHAHA!! Any last words Twilight?" Said Rainbow Dash while enjoying all of Twilight's fear.

"R-rainbow Dash... I know you'll do great without me... Heh... I was always a useless friend, wasn't I...?" Said Twilight in sadness while still managing to smile a bit.

"Yes you always were!" Said Rainbow Dash with her sadistic grin.

Rainbow Dash went over to Twilight, who was ready to embrace her friend killing her and poured the contents of the large vial inside her mouth. Immediately, Twilight began yelling in agony, as her tongue started melting from the corrosive liquid, as it traveled down inside her, eventually to her organs as it melted through them and through her torso onto the floor, blood and organs pooling out of the gaping hole in her torso, causing Twilight to spaz out in agony as her insides were being melted through, eventually resulting in her last breath before dying, her eyes staying in a expression of shock as the floor was now filled with blood and organs.

"Sayonara, egghead." Said Rainbow Dash, before she picked up her hammer and also Twilight's broken horn and walked back up the stairs. As she was walking up the stairs to the main hallway in the Castle of Friendship, another memory resurfaced into her mind.

"Wait, so you're saying that when you did the Sonic Rainboom, it made us find our purpose, our cutie marks? All because of you, Rainbow Dash?"

"Hehe, yeah. It's no big d-"

"I can't believe that we were all destined to become friends with each other, all because of you Rainbow Dash!"

"Twilight does have a point darling! This makes me so happy I'm crying!"

"Aww.. Girls you're going to make me cry too...!"

"Thank you so much Rainbow Dash..!"

"Thank ya kindly Dash! If it weren't for you, we all would have never gotten our cutie marks and met each other!"

"Aw... Girls... You're going to make me sappy again.... I'm starting to cry already.."

"Awwww..."

"You know what this calls for? A PARTY!!"

After the memory was over, Rainbow Dash reached the top of the stairs. She tugged on the tapestry to close the laboratory entrance before heading to the entrance to the castle. Rainbow Dash opened the doors slightly to check if any pony was awake nearby, before proceeding to open the doors fully and then close them once outside.

"Fluttershy is dead, and now Twilight Sparkle is dead as well." Said Rainbow Dash as she looked towards Carousel Boutique in the far distance.

"Looks like you're next Rarity." Said Rainbow Dash before heading towards Carousel Boutique.

Author's Note

And with that, Chapter 4 comes to a close with Twilight Sparkle brutal murder as Rainbow Dash heads to Carousel Boutique to kill Rarity next! The next chapter will be a side chapter, focusing on Trixie, on what she's witnessed so far, so be sure to keep an eye out for Chapter 5 - A Feeling of Dread!