The Adversary is an archetype found across cultures, manifesting as figures such as Satan, the Devil, Iblis, Mephistopheles, and Samael. Sometimes depicted as separate from God and other times an agent of them, this figure represents the inclination of evil in humanity.
Frasmiel is a demon who appears as a giant serpent with a human head. He’s a subordinate of the prince Uriel and infernal duke who commands 650 lesser demons. He’s known for being particularly evil and dishonest, like the other dukes who serve under Uriel.
Rusalkas are water spirits from Slavic folklore, who appear as a pretty young girls with long hair. In some versions of lore, Rusalkas are the souls of drowned women or unclean spirits who lure men into water, and drown them by entangling their body with their long red hair. Image: Ivan Bilibin
Pazuzu (𒀭𒅆𒊒𒍪𒍪) is the ancient Mesopotamian king of wind demons. He’s responsible for storms, drought, famine, and locusts. Though evil himself, Pazuzu is invoked on amulets to drive away other evil spirits, like the malicious goddess Lamashtu. He’s also the spirit that supposedly possessed Regan in the film, The Exorcist. Image: World Imaging/PHGCOM on Wikimedia Commons