The Cutie Mark Ripper: Conquest is Magic

Rosie flew through the broken-down shed, making sure everything is as it should: Broken and deceptive. She lands right in front of the bookcase and moves some color-coded books around, "White, dark blue, pink, purple, light pink, and white again." There, a secret trap door opens below her. Rosie couldn't help but smile as she slid down into her true home and lair. She always enjoyed the slides in the playground near her old childhood home. "Childhood..."

At the bottom of the slide, a security checkpoint appears before her. Exactly like the ones in the airship ports so no rogue magic could sabotage the ship. However, for Rosie's purposes, this checkpoint severed as a way to check if it’s Rosie walking through or some other creature that shouldn't be where they were supposed to be. Thankfully for Rosie, the system dinged to indicate clearance and a voice spoke from it, "ACCESS ACCEPTED! WELCOME HOME, MASTER!" And the wall in front of Rosie opened up, revealing her true home.

Rosie walked into the main hall, which leads to the main living room and dining room. In the living room, Rosie could see all the ghosts of the ponies she killed, chilling out, reading books, having conversations, or in Luster Dawn's case, comforting the recently demised. Rosie rolled her eyes at the irony and started to walk to her bedroom, however, Luster Dawn stops her by teleporting in front of Rosie, "Yes?" Rosie questioned.

"What are you planning to do with us? We are here for a reason."

"Please, you are nothing but a nuisance. I have no use for souls like you. You simply sever as a reminder of my sins."

"So..." The newly killed earth pony sniffles, "I can't go to the great beyond...?"

Rosie thought for a moment and replied, "You all have unfinished business, and that business is me. For as long as I live, you will forever be bound on this plane." Rosie turned back to Luster, "May I leave now?"

Luster wordlessly lets Rosie through as she goes into her bedroom just across the hall. Luster sat down on the couch, "So... What do you think she's going to do now?"

"Her plan must be to conquer all of Equestria!" Ruby Moonlight shouted.

"Yeah I got that Ruby, but what are the details? 'Conquer all of Equestria' is a pretty broad idea. How will she do it?"

"I think she has a 'dream board' in her room." Sandy Dream says, "I wouldn't go in there though."

"Why not?"

"Because she uh... Probably is going to have some 'fun' before bed."

"Oh... Yeah, I don't need to see that..." Luster facepalms, but notices one 9 ponies in front of her, "Wait... Where's Ruby?" The ghosts point towards the hall. Luster turns and sees Ruby floating to their killer's room, "Ruby where are you going?"

"What? Do you think I'm going to miss out on the show?" Ruby questions.

Luster just stares blankly at Ruby, "Yeah I'm not going to question or stop you..." Luster faceplants into the couch. This existence hadn't been all sunshine and rainbows for her at all.