Overview - A spirit being with supernatural powers, generally considered malevolent.
Alp - A spirit associated with nightmares. Also Alp-drucken, and Painajainen. See Nightmare. (German)
Archdemon - An upper level demon in the infernal hierarchy. (Christian)
Bajang - A vampiric demon with the ability to take the form of a cat.
Cambion - The offspring of a human and a succubus or an incubus.
Demoness - A female demon.
Fallen Angel - An angel that has lapsed into sin or has been exiled from heaven. (Christian)
Familiar - A spirit, often in the form of an animal, that assists in sorcery and witchcraft. (European)
Goblin - A malformed creature related to the fae. (European)
Gorgon - A winged female being with live snakes for hair. (Greek)
Imp - A small mischievous demon related to the fairy. (European)
Incubus - A male demon that attempts to have sexual relations with people while they sleep.
Jikininki - A ghoulish demon that feeds on human corpses. (Japanese)
Jinn - An invisible shapeshifter that can appear in the form of a human or an animal. (Middle Eastern)
Kappa - A vampiric creature that resembles a human with green skin. (Japanese)
Leviathan - An immense sea creature also known as the demon of envy, and The Grand Admiral of Hell. (Hebrew)
Marching Hordes - Demons that cause war.
Nickar - A sea demon. (Scandinavian)
Nightmare - A demon that causes night terrors. Also Ephialtes, Mara, and Walriderske. (Scandinavian)
Poltergeist - A noisy, mischievous spirit connected to a live human, usually a child. (German)
Puck - A mischievous nature spirit or demon.
Rokurokubi - A demon that appears as a human with the ability to stretch its neck to unnatural lengths. (Japanese)
She-demon - An evil female being or spirit.
Succubus - A female demon that attempts to have sexual relations with people while they sleep.
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