The Wyrm of Pathos.

Wyrm seems to be a generalised term for most Draconic creatures.
A sort of waste basket for different kinds of dragons especially the Wyvern types.
In this case however it refers to the snake like dragons who live in the mountains of a country called Pathos.
These Wyrms are related to the more common westeren dragon, and to the rare eastern dragons.
Although these dragons do not fly, they are very swift and are capable of glideing by spreading their ribs like a gliding snake. this flattens their bodies and allows them to glide 10 times the distance they could normaly leap.
They are highly intelligent, and more active than their western cousins. Their breath weapon is lightning based.