The Gromnies, ferocious, draconian predators, are among the rare native species to survive the Olthoi and the arrival of competing species from other worlds. Breeds of different colors dwell in deserts, mountains, forests, glaciers and swamps, and some have also found their way underground. They stand from three to five feet tall at the shoulder. They are extremely aggressive and vicious, ravaging their victims with tooth and claw. In addition, they are known to spit various breath weapons — fire, ice, lightning or acid, depending on their breed.
From references in Empyrean lore, it seems that the gromnies are the juvenile offspring of the mythological flying creatures called gromnatross. Gromnatross have never been seen by humans; some theorize that they have gone extinct or otherwise left the world.