She had only recently become aware of the exact location of the disturbance. It was a subtle thing, easily overlooked. Had she not been meditating that very night, she might have missed its essence altogether. For weeks she had scoured Equestria, trying to determine what it was she had sensed. Always quiet, not wanting to alert her sister if it could be avoided. It wasn’t the Nightmare—she could taste the difference—but that only raised more questions.