Cubed, Twilights descent

In front of her a machine rose from the ground. It was shaped like a mini escape pod and was completely white except forms all amounts of grey and black. A few feet away an elevator appeared.

"Escape it or take it." It said. She understood that it was now up to her, would she? Her friends, maybe it was just. A misunderstanding. Maybe she could just talk to them. They would work it out.

"No she though, 8 years I've been here I deserve this." With that she started walking to the pod and got in. As the pod closed around her she was suddenly in pain! It felt as if needles were pressing into her and she couldn't escape. "This machine was KIILLING her. Seconds later she could see again. It was cube 13, the way she was seeing it was grainy, like she was watching it through an old television set. She looked around and saw she could look at any of the cubes. She could also put in or take away objects from the cubes. Complete control.

"Congratulations, you are now in control." The voice of It rang out. For the first time she recognized this voice. With a horrible realization ominous in like a hurricane she recognized it as her voice. "You are now the being you referred to as "It". Even though you are me now it has always been you. The day you powered up the elements and created magic you fell terribly ill. The only option was to keep you from knowing your full past in a physical form. Keeping you here was the only way to save you. Celestia said you had been cured 7 years ago, but it was only a replica. So now you must remain here completing this cycle over and over. It was agreed while here you could be doing something that you loved. You may have not realized it but you love this. Secretly through all you've been in it is one joy you can count on. This time loop me you and all of us call home is yours now. Remember, the cycle must go on." Then Twilight was alone. Then she noticed something in cube 1. It was a mare, about 14 or 15. She had a purple mane a purple horn and purple eyes She said,

"Hello! Any pony! I'm Twilight Sparkle!" This was something she needed to interact with.

"Hello, and welcome to the cube. This is a cube made of many other cubes 15 by 15 feet. Your task is simple, complete a test in each cube until at the end you will receive the ultimate reward." She then knew that as she slowly learned if her past. The cycle would continue.
" I'm sorry. Please forgive me, friends it must be done."