Hertasi are active in the summer, and if they do not live in a Vale, they get sluggish in winter like all other cold-blooded animals. During the cold months they sleep as well as craft, making wooden carvings, clothing, and other utilitarian and decorative objects. If it gets too cold, hertasi can get very sick, and sometimes die. They seem to share a hive-mind, as information known to one becomes common knowledge to all of a Vale's hertasi. They are able to use Mind Magic, and some of them become Healers and Mages as well. The hertasi motto is "We can do this." (The Black Gryphon)