Princess Celestia's hooves clattered across naked stone, her blood roaring in her ears as she thundered her way through the once-secret maze, walls and side-passages rushing past in a blur. Her metallic shoes struck sparks from the floor as she skidded and swerved through her turns, assisting herself with forceful downthrusts of her mighty wings. She'd seen the tracks, the path cleared through the dust; somepony'd been here, recently, dispelling any notion that the temporary disruption in Equestria's magic field was a mere fluke.