A glabrezu is a large, chaotic evil demon known for its two pairs of arms, one ending in powerful pincers and the other in clawed hands. They are skilled in temptation and trickery, often luring mortals with promises of power while hoarding wealth and magical items.

Encounters: Underdark route to Zhentarim Enclave

Mariliths are six-armed demons with the upper body of an attractive humanoid woman and the lower body of a giant green snake. They are known for their intelligence, tactical skills, and combat prowess, often wielding multiple weapons in battle.

Encounters: Underdark route to Zhentarim Enclave

A dire troll is a huge, chaotic evil giant that can regenerate and deal poison damage. It has a bite, four claws, and a whirlwind of claws attack that can hit multiple targets.

Encounters: Underdark route to Sloobludop

Savage and territorial, quaggoths climb the chasms of the Underdark. They maul their foes in a frenzy, becoming even more murderous in the face of death.

Encounters: Velkynelve

Drow are dark elves who dwell primarily in the Underdark, a vast subterranean world beneath the surface. Their society is cruel, hierarchical, and deeply influenced by the worship of Lolth, the demon queen of spiders, who promotes chaos, ambition, and betrayal; as a result, drow culture is typically matriarchal, with priestesses holding the greatest power. Noble houses constantly scheme against one another, where assassination, slavery, and political manipulation are accepted tools for advancement. 

Drow value strength, cunning, and magical prowess, and those who show weakness are often exploited or sacrificed. Although most drow are portrayed as evil due to this oppressive system, individuals can and do reject Lolth’s influence, becoming exiles or surface-dwellers who struggle against the prejudice their people have earned.

Encounters: Velkynvelve.

Gnolls are feral humanoids that attack settlements along the frontiers and borderlands of civilization without warning, slaughtering their victims and devouring their flesh.

Encounters: Close to the Council outpost.