Hydrags

Hydrags are huge creatures that roam in the Wastelands outside the Dragon City. They are not friendlier to humans or dragons except for Beau. We first saw that Hydrags did not attack Beau in Episode 31: No Paynn, No Gain. It is also known that hydrags have gold draconium in their bone just like Beau which might explain why Hydrags didn't attack Beau.