This guy is named Windell and he is a Koiranos.

Adopted this guy from Karijn

Description: The Koiranos is a dog-goat hybrid with a poisonous snake tail and visible skull. The two halves of the lower bone jaws of both goat and snake are separated and work like pinchers that secure the bite. The Koiranos' main head is basically blind and relies on the keen sense of smell of the tail-head to navigate. So when a Koiranos is wagging its tail it's probably searching for prey and *not* trying to be friendly. When they're asleep, the snake tail curls on itself and close to the main body.
Koiranoi (plural) are used, thanks to their ability to assume a fully human shape, as assassins. Even as humans they have really poor eyesight so they have no trouble to navigate in the most obscure places even by night. While they mostly work as mercenaries, the Kingdom of Ansert in Etherwas has an official military unit of 300 Koiranoi called 'the Silencers'.