You didn't tell me you had a new chapter out :o lol Good job so far :) I enjoyed the killing lol I wanna see how everyone reacts to Fluttershy being gone now that Blanc isn't in her form hehe

Also, there were two parts where you used incorrect tenses...
"but every time they'd turn around, they sees nothing. Rarity figured it must simply be their imagination and reassures Sweetie that no one is following them. This kept occurring sporadically until they finally arrived at the Carousel Boutique."
It should be saw and reassured :D haha sorry but it bothered me :p

OHMYGOD,

POOR SISTERS

OH CELESTIA WHY RARITY! WHY SWEETIE BELLE! It's so sad, but yet so amazing!