Snow

For the most part this is a tranquil place.

An ancient castle overlooks the houses below, snow lies thick on the ground and on the roofs, all encompassed by the great glass dome of the sky.

But infrequently and without warning a terrible disaster befalls those here. Black shadows trace across the heavens, five dark pillars.

A heaviness comes as gravity increases, relaxes, disappears, returns stronger, repeats. The snow rises from the ground and swirls about in the air. After an age, with a thud the world stops moving; the snow continues to draw wild spirals, before finally settling again.