Sulpha is a sacred dragon of the Hawk Men with poison breath. The dragon destroys the Hawkmen's sacrificial victims, much like the droks at Ming's palace. Flash and Thun accidently fall into its pit when escaping the Hawkmen and Thun is knocked out by its breath. However Flash is able to knock Sulpha out long enough to blast the wall and climb on the remnants out of Sulpha's reach. ("The Monsters of Mongo")
- Sulpha has some resemblence to the Lernaean Hydra.