From the very beginning, she’d been trying to get into Trixie’s dreams. Something was blocking her, and she’d been unable to find out what. She’d spent months, skulking through the archives after hours, researching very obscure branches of magic. She could see the taint of corruption—she could see the subtle changes around Trixie’s cutie mark, one of the surest signs. They were not visible to the naked eye yet, but they would be, and they would never fade. It was a condition Luna was quite familiar with.