In the Dungeons & Dragons fantasy role-playing game, the glabrezu is one of the most powerful types of demon. In first edition Advanced Dungeons & Dragons, glabrezu were known as type III demons. In second edition AD&D, the name "type III demon" was changed to "glabrezu".
The glabrezu was one of the earliest creatures introduced in the D&D game.
The type III demon appeared under the demon entry in the Eldritch Wizardry supplement (1976).
The type III demon (glabrezu) appears in the first edition Monster Manual (1977).
This edition of the D&D game included its own version of the type III demon, which is known as the howling demon, first appearing in the Immortal Rules set, in the DM's Guide to Immortals (1986). The howling lesser fiend appeared in the Wrath of the Immortals set, in "Book One: Codex of the Immortals" (1992).
In this edition, demons became known as tanar'ri, and this creature officially became known as the glabrezu, a "true tanar'ri", appearing first in the Monstrous Compendium Volume Outer Planes Appendix (1991), and then reprinted in the Monstrous Manual (1993).
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