Blues are a goblinoid race with leathery blue hide, known for their psionic abilities, organizational skills, and tendency to infiltrate goblin tribes, often leading them due to their intelligence and power.

Caligni are tall, gray-skinned descendants of dark folk, often mistaken for dark stalkers, known for their defined features, treacherous society, and tendency to become rogues, slayers, or alchemists.

Derros are small, pale blue humanoids with bulging white eyes and wild hair, known for their insatiable curiosity, madness, and gruesome experiments on surface dwellers, living in secretive underground communities.

Driders are drow transformed into spider-like creatures as punishment by Lolth, known for their bloodthirsty nature, venomous bites, and ability to cast spells, living as outcasts in the Underdark.

Drow, or dark elves, are cunning subterranean dwellers with a matriarchal society, known for their manipulation, racial superiority, and chaotic evil alignment, often becoming powerful adventurers driven by a desire for power.

Duergar, or gray dwarves, are a subterranean subrace of dwarves with dull gray skin, known for their tyrannical and industrious nature, driven by greed and conflict, living in the Underdark near volcanoes.

Grimlocks are muscular, gray-skinned subterranean predators with eyeless sockets, known for their brutal hunting tactics, primitive societies, and raids on surface communities.

Hobgoblins are fierce, militaristic humanoids with gray-green skin, known for their conquest-driven societies, reliance on slaves, disciplined battle tactics, and valuing personal merit above all.

The Immicker is a subrace of the doppelganger, known for their shape-shifting abilities that allow them to mimic the appearance and abilities of other creatures, making them masters of disguise and deception.

Small, bipedal reptilian humanoids with gray-green skin, resentful of stronger races, clever with mechanical devices, relying on traps and ambushes, living in cramped quarters, and often serving more powerful beings.

Kuo-toa are amphibious, fish-like humanoids with slippery skin, known for their duplicitous nature, oppressive theocracies, and ability to manifest gods through collective belief, making them formidable in combat and religion.

Peepers, aka Skopions, are a mutated subgroup of the deep-sea Beholder, characterized by their large singular eye and multiple tentacles, who venture to the surface world to gather resources.

Svirfneblin, or deep gnomes, are serious and suspicious Underdark dwellers known for their wiry bodies, dark complexions, and exceptional skills in mining and gem-cutting.

Troglodytes are scaly, leathery-skinned humanoids with bone growths, claws, and powerful tails, known for their brutish society, chaotic nature, and efforts to redeem their race’s past through bravery.

Trollkin are agile, smaller cousins of trolls with mottled blue and grey skin, known for forming beneficial alliances, living in underground communities, and often working as mercenaries or bandits.

Xeniomorphs are shape-shifting beings closely related to mimics, capable of mimicking any object with uncanny precision, granting them exceptional abilities in stealth and subterfuge.

Yaggols are green-skinned, psionic beings, offshoots of illithids, known for their neutral alignment, emphasis on personal growth, and diplomatic nature, living in close-knit communities and often acting as mediators.