Down a winding corridor he raced, up a twisted stair, through a carved door, and the same instincts that had brought him there told him he had found what he sought. He was in a circular room with a domed roof from which shone a livid blue light. A strange structure rose in the middle of the rainbow-hued floor, tier on tier, each of a separate, vivid color. The ultimate tier was a purple cone, from the apex of which a blue smoky mist drifted upward to a sphere that poised in mid-air -- a sphere that shone like translucent ivory.