A piece of chalk traced a series of complex lines on the smooth black surface, then was set down at the base of the blackboard. The pages of a large open book on the table turned until they reached one showing a drawing that looked extremely similar to that on the blackboard. A smaller book floated open by its side, with a slightly different set of symbols on its pages. The piece of chalk floated back and a couple of other lines were added to the drawing. The chalk and the smaller book were both set down again and a small crystal was lifted from the table.
The crystal began to glow, its dodecahedral shape emitting bright flashes of light from each one of its faces. The light intensified and the rays started to bend, beginning to curve until they entered back into the prism from one of its other faces. A high pitched note came from the crystal, permeating the library with its sound. Abruptly, one of the rays of light snapped out, the sound becoming distorted. The flow of magic to the crystal was cut and the light dissipated, along with the sound, then the crystal was brought back down on the table.
Another large book flew from the shelves to land near the others, opening to reveal another series of symbols and circles. Numerous others were taken from the bookcases, until the table had no space left for them, at which point they began to float open in midair. Each showed a different set of drawings, all slightly different from the others but still very clearly similar, some almost identical to others except for small details. A pencil and a sheet of paper were taken out of a drawer and a series of notes were written down.
The blackboard was cleaned, and the piece of chalk was hastily lifted once more. It collided with the surface a little too fast and snapped in two, half of it falling on the ground along with some dust. The floor was cleaned and the remaining piece of chalk once again began to move along the black surface. Intricate lines and shapes were traced by the floating chalk, complex arrangements of circles, dots and other shapes appearing as white marks over the dark background, accompanied by inscriptions and runes in alphabets used for languages long forgotten by most.
The crystal floated up again, again starting to glow and emanate a sound. It became brighter and brighter, and once more the light emitted began to bend and sway, converging and twisting on itself as it created a series of small tentacle-like structures that travelled between the various faces of the polyhedric surface. The sound became louder and louder, until suddenly it turned from an harmonious note into an ear-piercing creak that lasted for a few seconds before the crystal burst into pieces.
Every book was violently shut and left to fall to the ground, and the library's large doors were loudly slammed.