Shades Against Shadow
Too Long; Didn't Read
The corridor ended in a narrow slit of room, and the wall before them was not the worked stone of the citadel but a single slab of what appeared to be glass curdled into creamy ridges and depressions.
Here were the Foanna, their robes once more cloaking them. Each held, point out, one of the rods. They moved slowly but with the precise gestures of those about a demanding and very important task as they traced each depression in the wall before them with the wand points. Down, up, around ... as their feet had moved in the dance pattern, so now their wands moved to cover each line.