To create the dragon fire, the FX team used a pair of military-style flamethrowers.
The entire movie was filmed in natural light.
The dragon in the movie actually has a name, called by its full name by the sorcerer Ulrich, and by its first name by King Casiodorus Rex and by Galen: Vermithrax Pejorative.
First film to use go-motion, a variant of stop-motion animation in which parts of the model (in this case, the dragon) were mechanized and the movement programmed by computer. During shooting, the computer moves the model while the camera is shooting, resulting in motion blur, which makes the animation more convincing.