The Shadow is a common monster who reigns our world and feeds on the weak.
A shadow is a monster who is undead because it's ghost-like. Shadows have a teleporting ability. They feed on pure life-force (humans, animals, plants.) They look like you can see almost through them, skeleton like, with bright eyes and a hood over their heads and shoulder. completely black and a black mist follows.
Shadows can be destroyed by light-magic, the sun and other light projecting objects.As they can be converted to ghosts or nothing.