Underdark Monsters

in OSRIC

• Amber Creeping Vine - A climbing plant with striking amber flowers that feeds on the brains of living creatures
• Aurumvorax - Eight-legged mustelid the size of a medium dog with a thick gold coat
• Basilisk - 10' long, serpentine lizards. Unintelligent, but highly magical
• Bat, Ordinary - Common bats that swarm when startled
• Bear, Cave - Monstrous bears even larger than grizzly bears
• Blindheim - Yellowish, frog-like humanoids that project twin beams of incredibly bright light from their eyes
• Brown Mould - A heat-absorbing fungus that feeds on energy and grows in darkness
• Bulette - Terrifying predator that resembles a gigantic armadillo crossed with a snapping turtle
• Carcass Creeper - A fearsome, subterranean omnivore described as the magical hybrid of a cutworm and a squid
• Caterwaul - Feline predator resembling black panthers walking upright that stalks darkened caves
• Cave Lizard - Lizards that dwell in underground settings with camouflage colouration
• Centipede, Giant - Larger versions of normal centipedes, 2 to 3 feet long, fast-moving predatory venomous arthropods
• Coffer Corpse - Resembles a zombie, a rotting, fetid corpse of the dead left unburied
• Crypt Thing - A cloaked skeleton that guards its lair with teleportation magic
• Cyclops - 20' tall humanoids with a single, central eye
• Dark Creeper - Short, spindly humanoids with pale skin who wrap themselves in loose, dark clothing
• Dark Stalker - Leaders of the dark creepers, much taller than their followers
• Ettin - Large, nocturnal two-headed creatures that live below ground
• Executioner's Hood - A small, weird monster that drops from above to strangle victims
• Fire Lizard - Giant lizards with tough scaled hide, thought to be an evolutionary dead-end on the dragon family tree
• Gelatinous Cube - Nearly transparent cube that travels dungeon corridors absorbing carrion, creatures, and trash
• Giant Bat - Large carnivorous bat with 15-foot wingspan
• Giant SLug - Large boneless creatures that spit acid and burrow through wood and earth
• Giant Tick - Giant invertebrates that dwell in ruins and upper dungeon levels
• Green Slime - Dripping, green slime that clings to walls and ceilings
• Grey Ooze - Slimy horrors that lurk on stone surfaces or among boulders
• Grimlock - Muscular humanoid with gray skin that is blind but has exceptional senses of smell and hearing
• Ice Troll - Semi-transparent trolls with bodies that appear chiselled from blue-tinged ice
• Kobold - Small, dog-faced reptilian humanoids
• Large Spider - Common dungeon and ruin dwelling spiders of various shapes and colours
• Lurker - Dangerous creatures resembling manta rays that wait in high places to drop on prey
• Minotaur - Huge bull-headed humanoid monsters
• Mobat - Very large bat found in warm regions with plentiful warm-blooded prey
• Nilbog - A goblin infected with nilbogism, surrounded by a weakness in reality that causes chaotic, contrary effects
• Otyugh - Large creature with 4 legs, 8-foot diameter body, and 3 tentacles behind its mouth
• Piercer - A cone-shaped shelled creature resembling a snail that hunts by dropping from cave ceilings
• Purple Worm - Gigantic subterranean monsters with poisonous stingers
• Quartz Roper - Rocky creature with living quartz hide that appears as a brownish or smoky grey crystalline statue
• Roper - A 9-foot tall creature that tapers from 3-4 feet in diameter at the base to 1 foot at the top, weighing 2,200 pounds
• Rust Monster - Strange monster built like a huge turtle with insectoid head and feather-like antennae
• Shambling Mound - Intelligent plant creatures appearing as piles of rotting vegetation
• Shrieker - Large, semi-mobile fungus that wails loudly when approached or threatened
• Skeleton - Mindless undead created to guard tombs or serve their creator
• Spirit Naga - Evil naga with black scales and blood red bands, large misshapen human-like head
• Stunjelly - Translucent creature that appears as a normal section of wall until prey approaches
• Trapper - An amorphous ambush predator that lies flat and mimics stone floors
• Troglodyte - Intelligent, reptilian humanoids with agile hands, long legs, short tails, and spiky combs on their heads and arms
• Troll, Giant Two-Headed - Vicious offspring of trolls and ettins with two heads and regenerative abilities
• Vilstrak - Rocky-skinned subterranean humanoids that merge with stone
• Violet Fungi - Plant creature that resembles shriekers, with branches that release rotting spores
• Xorn - An embodiment of the element of Earth that glides through stone
• Yellow Mould - Deadly fungus that covers walls, ceilings, and other surfaces