Stone Dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Beat of Caves and Silence, one of the Twelve Dreamers, doesn't beat out a song with a clear melody. He'll thump his feet and tail and wings on the ground to make a complex beat, while singing a dark song with no lyrics. His song is one of the darkest out of all the Dreamers', even if it wouldn't seem so.

He dreams of a land dark blue in hue—nothing is lighter than a deep ultramarine, nothing at all. A labyrinth of caves and waterfalls lie below the flat surface, of course, all of blue rocks and nothing brighter than that dark ultramarine.

Silence is rather proud of his land and his song, no matter how different it is from the others. But he'll bow to the other Dreamers, even if he doesn't really think that they're better than him, even if he thinks that he's the best out of all Twelve.

None of them really know why he's so quiet all of the time or why he concedes to them, even when his answer is clearly the right one.

It's just a commonly accepted fact with them.