Green Dragons are also sometimes called “earth” dragons. They usually live deep within caves, and have power over the earth. They are capable of launching boulders at high speeds, and can cause earthquakes by slamming down onto the ground.

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.

Smasher, the name he's casually referred to by, is constantly competing with Earthquake of Doom for the best egg smashing pebble.

Although he's older than Doom by a few months, he unfortunately has also had more misses (Sympathy bouts, as the other pebbles say when they gossip nastily about him) than Doom has.

This took away any head start he had on Doom, but he's still determined to be the most destructive Pebble ever.