Based on the image https://derpibooru.org/images/2524404?q=cozy+glow%2C+flurry+heart%2C+chain

>The concert ended up sucking because Flurry got caught.
>"You got me to release Cozy for a concert?" Asked a very unhappy Twilight.
>"Um, yea auntie, it was totes gonna be awsome enough to reform Cozy."
>Twilight just stared at the teenager in disbelief.
>Cozy facehooved.
>Flurry almost seemed to look proud of that excuse. Not that she smiled much these days as that would ruin her style.
>"Can I get somepony else to reform me, please?" Begged Cozy. "I promise I'll actually listen to them!"
>Twilight looked at Cozy, who was starting to fear that she might get turned back to stone.
>"No fair!" She thought. "I didn't even try exacting my revenge yet!"
>Twilight thought about what to do.
>Cozy was a resourceful, smart and cunning filly who would still use her skills for evil.
>And Flurry was a powerful and streightforeward teenager who's actual intellect and kindness had been repressed by years of spoiling on her parents part.
>Actually...
>She cast a spell on the horn ring which kept Cozy chained to Flurry.
>"Hey, what gives?!" Asked Flurry, now feeling strangely empty.
>"As punishment for your deception, I modified the horn ring to nullify your magic."
>"But auntie, that's so uncool!"
>Cozy was about to giggle at Flurry's misfortune when she realized that she was still chained to her.
>"No buts, Flurry Heart. I will only let you have your magic back until Cozy Glow has proven to be sufficiantly refomed."
>Neither filly was all too pleased with this.
>"Aw, come on!"
>"I'll like, tell my mom!"
>"Cozy Glow!" Twilight adressed the younger filly. "If you want more freedom, I suggest that you work with Flurry Heart to change your ways."
>"But, but-"
>"And Flurry Heart!" Twilight continued, ignoring Cozy's protests. "I've already notified your parents on what you did and they'll be here shortly and considering how proud they were that you volunteered for this, I don't think they would protest to this new arrangement."
>Flurry gulped.