Hermione shuddered at that. "The first floor is going to be a blood bath; you three be careful, because there won't be many survivors for you to rescue." She thought about it for a second, and hit the button for the lift. "You three go down to the first floor through the lift system, then once you're on the first floor I'll barricade it and you make your way back up the north-east stairwell. My team will be clearing out the second floor while you're on the first."