Cave Wyrm

Cave wyrms are vicious serpents with sharp teeth that live in caverns in the mountains and below the surface. They are at least a dozen feet long, awfully thick, slimy, and either scaly or non scaly wyrms, often seen with goblins who use them as mounts. 
Cave wyrms also have small hindlimbs, and some of them are poisonous. They are fast, aggressive, and one of the most deadly creatures of Astra. 
Many cave wyrms are scaly or can breathe fire, yet are not considered dracowyrms.