Exterminators are a rogue species of dragon that are exceptionally dangerous. A pack of Exterminators can destroy an entire landscape by setting fire to it. They have two hearts, long, extendable sword-like talons and kill for pleasure. The babies are hatched in lava. They first appear in How to Twist a Dragon's Tale. They are the only dragons that could stand against a Murderous Dragon in a fight, and as such are feared nearly as much as the Murderous Dragons. And, it must be heavily stressed, despite the fan picture, Exterminator Dragons don't have have hindlegs (As seen in Page 206 of How to twist a Dragon Tale,
It was written in page 147 of the same book that was and i quote Once you have looked into the eyes of an Exterminator, it is impossible to forget them. The look in an Exterminator's eyes, of pure, concentrated, white hot FURY, The irises vibrating with pinpoint anger, is a look that haunts a person through their waking hours and in their nightmares forever after unquote.