No Slytherin was ever used to descending THAT many staircases in record time.

Nope, and that'd be why Sierra was just now arriving at the entrance of the Great Hall from the Astronomy class. The Astronomy class where the professor had been freakin' EATEN. She was still in a small state of shock over that one.

...but apparently there was a plan, because they'd all been asked to head here, to the Great Hall.

Sierra blinked as she overheard Ellwood saying something about having to watch kids for four hours. She was a professor...in a boarding school. What'd she think she'd be doing--watching pansies grow?! Nevertheless, Sierra sort of felt her pain. Four hours?! Hello, bathroom break!

"I'm here to help," Sierra said, looking toward the assembled professors.