The greatest trick the Great and Powerful Trixie ever performed was convincing all of ponykind that she was a mere unicorn. Years later, Princess Celestia and Trixie have a discussion by Twilight Sparkle's grave.
Every day, Princess Celestia wakes up in terrible pain, and every day, she chooses to endure it, until the one day she's left feeling blissfully normal. Few things have ever scared her so much.
When Twilight Sparkle went to bed, she had friends she loved and a life she enjoyed. But she awoke to hospital gowns and padded restraints. And the doctors, they keep telling her that she is sick and none of it was real. They’re lying, right?