A low rumble cut her train of thought short, and the ground suddenly shifted beneath her hooves. Twilight looked around, alarmed, trying to locate the source of the tremor. Another rumble shuddered through the ground, and small piles of dust fell from the ceiling. Twilight watched as a red glow washed through the broken windows on all sides of the hall. It filled the entire room with a flickering crimson light, causing her shadow to dance feverishly beside her.