A Succubus is a female demon or supernatural entity in folklore that appears in dreams and takes the form of a human woman in order to seduce men, usually through sexual activity. Religious traditions hold that repeated sexual activity with a succubus may result in the deterioration of health or even death. An Incubus is a demon in male form who, according to a number of mythological and legendary traditions, lies upon sleepers, especially women, in order to have sexual intercourse with them. An incubus may pursue sexual relations with a woman in order to father a child, as in the legend of Merlin.[1] Religious tradition holds that repeated intercourse with an incubus or succubus may result in the deterioration of health, or even death What do these two mythological creatures have to with 18-year-old Callypso Eldrich? She may not know it but her life is about to change dramatically.