Cathy
Sunset Shimmer was hanging above her Heart Station's glass pillar, bounded by green metallic chains that seem to extend for miles on her wrists and ankles like some sort of prisoner. Sunset would of been asleep since she was first mind controlled by Maleficent, until she slowly opened her eyes but it was just halfway and her eyes close had no shine effect.

"This... Is... My... Heart...?"

Sunset spoke softly and slowly in the Heart Station prison as her eyes shift around the glass pillar, noticing that it was halfway taken over by the darkness. But then she heard an odd laughing sound to the point her eyes blinked back to normal after several blinks.
Matthew
"You bet it is! And boy did your new step mother gave it good cleaning! I was sick and tired of watching the light of your being fully under control... But now i get full control to have fun!!"

The voice right below Sunset Shimmer was her Inner Darkness itself, looking much like Midnight Sparkle but with a black outline signifying her being the darkness within Sunset Shimmer.

"Not even that demon form Darkdream Shimmer could do such evil acts, but i am sure to fill in her shoes!!"
Cathy
Sunset was now horrified to see this being was very evil judging by the black outline on her inner darkness.

"You... So THIS is what ive been warned of...!"

Sunset tried to move, but the chains were just not letting her budge at all.
Matthew
"Good luck trying to break free dearie~... Those chains aint gonna break until you give in to me... Or somehow you find your inner self again...~"

The being said to Sunset as a strange visionary screen appears behind Sunset's Inner Darkness.

"For now however, you get to sit back and watch me have a joyride with your body! Im going to torture your friends, maybe starting with Twilight!!"

She said while laughing as the dark being turned to face the visionary screen, which upon the two watching said screen, would be Sunset's body moving along in Hallow Bastion.
Cathy
Sunset couldnt do anything at all. She would only watch to see what would her own Inner Darkness would do using her body, knowing full well Sunset really regretted not staying away from Maleficent...

**She could only hope for Twilight or someone else to free her from the ultimate nightmare she let her anger get the best of her...**