Incubus

The incubus is a male demon, that feeds on the energies of women, seduced either in dreams or the waking world. While they are often in the forms of attractive men, they usually have certain inhuman traits, such as hooves, horns, tails, forked tongues, unnatural eyes or even wings.

Their female counterpart is the Succubus.

Source
The incubus has been featured in european folklore during the middle ages.

Media
The incubus appear in the following media:

Games

 * Gems of War
 * Gems of War

Novels

 * Berserk