
The succubus rarely discloses her true form.
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The succubus is a demon, stemming from medieval legend, that takes the form of a woman in men’s dreams with the purpose of having sexual intercourse with them. They are often depicted as having demonic wings and hooves, and a purplish complexion or skin tone. They might also appear as red, like a devil or demon spirit. They survive by feeding off the man’s energy, and will feed for several nights until there is nothing left of him.
The succubus is thought to be an allegory to unclean thoughts. If you dream of lustful acts it may come back on you as a curse. Tales of succubuses help men from being overwhelmed with sexual thoughts, by identifying those thoughts and dreams with evil, and stopping them from reoccurring. In modern times succubi (plural) are a term for women who drain energy from their companions.

Alps being released by the horerczy demon.
©BloodyLexicon.com
The Alp, from German lore, is a vampiric spirit, or demon, who can shape-shift. They are often described in german legends as appearing in nightmares as a bogeyman or an incubus.
Alps are considered to be a butterfly vampire and a released by the horerczy demon. (A horerczy is a German demon that releases vampiric butterflies out of his mouth.) Alps suck the breath out of humans. Not only do they appear as butterflies, they can also take the form of cats, pigs, birds, and sickly dogs. They also always wears a magical hat that gives the alp supernatural power and invisibility.
The alp are said to wait until people are asleep and will cause awful dreams. It enters the sleepers mouth as a form of mist or a snake and attacks with its evil eye. They also can sexually molests both males and females, drinking blood through the nipple of men and women. They also drink milk from women’s breasts as well as from cows. If you are a woman and want protection against the alp, it is said if you place your shoes next to your bed pointing them towards the door. It is also said that if a child’s mother used a horse collar to help with the difficulties of childbirth while that child was born, that child is at a high of becoming an alp.