Being similar to both a Wyvern and a Guivre, Wyvers have hind legs and wings. The difference is that their wings are attached to front legs that are like arms with hand-like claws on the tips, this being similar to that of a bat, having a long neck ending in a rectangle shaped head, their bodies being enormous in size, ranging from 20 to 60 feet at the shoulders, and the end of its tail has porcupine type quills. They spend most of their time in deep caverns away from everything else and survive by eating cave dwelling creatures.