Creature Catalogue
- Carrion crawler - large worm-like cephalopods that scavenge
- death dog - evil two headed dog-like creature, rumored to be a descendant of Cerberus
- Derro - a type of underdark dwarf, former slaves of the Duergar, now liberated but many live in poverty
- Duergar - the Gray Dwarves, found in the Underdark
- Ettin - nocturnal, two-headed giant-like creatures
- Firbolg - the smallest of the giant-kind, tending to matters of the forest
- Flumph - Sentient and telepathic aberrations with the appearance similar to giant jellyfish which float through the air
- Grick Alpha - body like a giant worm, head like a giant octopus
- Hook Horror - aberrations with front limbs with sharp, blade-like hooks
- Kuo-toa - fish-headed people
- Myconid - mushroom people of the underdark
- Quaggoth - a wolf-like creature
- Rothe - bovine-like creatures found in the underdark, communicate by somehow emitting lights
- Shambling Mounds - mobile, carnivorous shrubs
- Stone Giant - giants with an ability to sense magic through stone and seem to shape rock to their needs as if it were natural
- Svirfneblin - Also known as deep gnomes