A drow priestess offers a sacrifice to Lolth while a nycadaemon stands guard (David Sutherland, AD&D module D3: Vault of the Drow by Gary Gygax, 1978; this B&W version on the title page repeats the colored image on the monochrome cover)
seen from Singapore
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seen from United States
seen from United States
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seen from Türkiye

seen from United States
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seen from United States
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seen from United States

seen from United States
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A drow priestess offers a sacrifice to Lolth while a nycadaemon stands guard (David Sutherland, AD&D module D3: Vault of the Drow by Gary Gygax, 1978; this B&W version on the title page repeats the colored image on the monochrome cover)
“Swat and his faithful bear companion take on an evil lich and a nycadaemon“ (Jeff Easley’s cover for Polyhedron 14 featuring an encounter by Roger E Moore, October 1983)
Mezzodaemon and nycadaemon, neutral evil inhabitants of the lower planes Tarterus, Hades, and Gehenna, between the demons of the Abyss and the devils of Hell. Many now refer to the daemons as yugoloths, and these specifically as mezzoloths and nycaloths. (Russ Nicholson, AD&D Fiend Folio, TSR, 1981) They originally appeared in module D3: Vault of the Drow, 1978.
Nycadaemon
The party encounters a mezzodaemon and nycadaemon for the first time. (David Sutherland from AD&D module D3: Vault of the Drow, TSR, 1978.)