Shademare is a mount.
The Shademare are wild horses that roam the realm of the Underworld. They were not originally native to this realm. Hades, envious of the majestic wild horses he saw in the mortal realm, brought them to the Underworld while altering their appearance and physique to his will.
Shademare are far stronger and tougher than normal horses, due to having to survive in a much harsher environment. They don't graze, but instead absorb energy from their surroundings. Riders should beware, those weak of will might find them selves becoming food for their own mount./
The Shadow demon looks like a blue horse with horns and haze around the top of its hooves. The color of the horse changes under the power of evolution.