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Terrain: Underground
Climate
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157 creatures

Name ▲ CR Type Alignment Size Speed Description
Adherer 3 monstrous humanoid LE Medium 30 ft., climb 10 ft. This pallid humanoid creature is wrapped in wispy strips of skin, with bits of detritus and a...
Akaname 1 aberration N Small 30 ft., climb 30 ft. This short, spindly creature has warty, brown-red skin and large black eyes. Its long, muscular...
Albino Cave Solifugid 4 vermin N Medium 50 ft., climb 30 ft.
Amoeba, Giant 1 ooze N Small 10 ft., climb 10 ft., swim 20 ft. This blob of protoplasm is somewhat transparent, allowing the bones of undigested meals and a...
Amoeba Swarm 1 ooze N Fine 10 ft., climb 10 ft., swim 20 ft. Thousands of tiny gelatinous clots of animate ooze swarm in a wet mound, surrounded by a cloying...
Amphisbaena 4 magical beast N Large 20 ft., climb 20 ft., swim 20 ft. This large snake has two heads, one at each end of its long, coiling body. Both display large...
Ancient Cloud Dragon 18 dragon N Gargantuan 40 ft., fly 250 ft. (clumsy), swim 40 ft.
Ancient Crystal Dragon 15 dragon CG Huge 60 ft., burrow 30 ft., climb 30 ft., fly 200 ft. (poor)
Ancient Sovereign Dragon 20 dragon N Gargantuan 50 ft., fly 250 ft. (clumsy)
Ascomoid 5 plant N Large 40 ft. What appears to be an enormous puffball begins to move on its own, rolling along at a frantic...
Azruverda 13 aberration CG Huge 50 ft., climb 30 ft. A humanoid head peers forth from this enormous creature’s beautifully iridescent, spike-covered...
Basidirond 5 plant N Medium 20 ft.
Bhole 17 magical beast CN Colossal 50 ft., burrow 50 ft. This titanic worm heaves its endless bulk into the air, raising one end as if ready to strike...
Black Pudding 7 ooze N Huge 20 ft., climb 20 ft.
Blindheim 2 magical beast N Small 30 ft., climb 20 ft., swim 20 ft. The size of a short, stocky humanoid with webbed feet and claws, this frog-like creature has...
Brain Ooze 7 ooze NE Tiny 5 ft., fly 60 ft. (good) Two slimy tentacles protrude from the sides of this brain-shaped mass of quivering ooze.
Buggane 5 monstrous humanoid CE Large 30 ft., burrow 30 ft. This hairless, hunchbacked giant has cruel tusks and two enormous, blunt-clawed fists that look...
Caligni 1/2 humanoid CN Medium 30 ft.
Carnivorous Crystal 11 ooze N Medium 10 ft., climb 10 ft. The facets of this crystalline formation shift and vibrate, as though in anticipation.
Cave Fisher 2 vermin N Medium 20 ft., climb 20 ft.
Cave Giant 6 humanoid CE Large 40 ft. (30 ft. in armor)
Cave Scorpion 1 vermin N Medium 60 ft., climb 40 ft.
Centipede Swarm 4 vermin N Diminutive 30 ft., climb 30 ft.
Charda 7 monstrous humanoid CN Small 20 ft., swim 60 ft. Armored in dense, bony plates, this four-armed creature drools wretched strings of black bile...
Choker 2 aberration CE Small 20 ft., climb 10 ft.
Cloaker 5 aberration CN Large 10 ft., fly 40 ft. (average)
Crypt Thing 5 undead NE Medium 30 ft. Shreds of leathery flesh cling to this skeletal figure’s body, while twin motes of fiery light...
Crysmal 3 outsider N Small 30 ft., burrow 20 ft. An animated cluster of translucent crystals shaped disturbingly like a gemstone scorpion...
Cytillipede 6 magical beast N Large 40 ft., climb 40 ft. This segmented creature has a chitinous body covered in patches of glowing, purple fungus....
Dark Caller 5 humanoid CE Medium 30 ft. Wrapped in tatters of dark musty robes, this humanoid figure weaves malevolent magic.
Dark Creeper 2 humanoid CN Small 30 ft.
Dark Dancer 1 humanoid CN Small 30 ft. Dancing in a wicked celebration, this slight humanoid is wrapped head to toe in dirty scraps of...
Darkmantle 1 magical beast N Small 20 ft., fly 30 ft. (poor)
Dark Naga 8 aberration LE Large 40 ft.
Dark Slayer 3 humanoid CE Small 30 ft. This small humanoid is clothed in tattered rags from head to foot. Only its sinister eyes and...
Dark Stalker 4 humanoid CN Medium 30 ft.
Deathtrap Ooze 8 ooze N Large 20 ft., climb 20 ft. The killing blade of this horrific trap drips with an animated sheen of foul brown-orange slime.
Decapus 4 aberration CE Medium 10 ft., climb 30 ft. This swollen cephalopod has ten writhing tentacles and a hideously monstrous face with pale,...
Destrachan 8 aberration NE Large 30 ft. The hunched, reptilian beast lopes on two clawed feet, its eyeless head dominated by a huge...
Dire Corby 1 monstrous humanoid NE Medium 30 ft., climb 30 ft. This creature looks like a humanoid crow with oily black feathers, glittering eyes, and a sharp beak.
Dracolisk 7 dragon N Medium 20 ft., fly 40 ft. (average)
Drider 7 aberration CE Large 30 ft., climb 20 ft.
Drow 1/3 humanoid CE Medium 30 ft.
Duergar 1/3 humanoid LE Medium 20 ft.
Earth Veela 7 outsider N Medium 30 ft.
Executioner’s Hood 2 aberration N Tiny 10 ft., climb 5 ft.
Faceless Stalker (Ugothol) 4 aberration CE Medium 30 ft.
Festering Spirit 8 undead CE Medium fly 40 ft. (good) This ghostlike creature reeks of the grave and drips with putrescent goo.
Flail Snail 4 magical beast N Large 10 ft., climb 10 ft. This enormous snail has a brightly colored shell and four tentacles on its head, each tipped...
Flumph 1 aberration LG Small 5 ft., fly 20 ft. (perfect) This pale, jellyfish-like creature floats gently in the air, two long eyestalks extending from...
Formian Myrmarch 10 monstrous humanoid LN Large 50 ft. This horse-sized insect has a brilliant red carapace, and its monstrous face reflects great...
Formian Queen 17 monstrous humanoid LN Large 5 ft. This large and majestic creature is nearly immobile, her massive abdomen swollen with her...
Formian Taskmaster 7 monstrous humanoid LN Medium 40 ft. This centaurlike creature is equipped with an ant’s mandibles and antennae.
Formian Warrior 3 monstrous humanoid LN Medium 40 ft. Armored from head to toe in gleaming black-and-red chitin, this insectile warrior’s tail ends in...
Formian Worker 1/2 monstrous humanoid LN Small 40 ft., burrow 10 ft. This small, centaurlike ant creature bears a huge, bulging sack on its armored back.
Fungal Crawler 3 aberration N Small 20 ft., climb 40 ft. This giant fanged cricket is caked in pungent fungal growths and topped with a mushroom-like cap.
Fungal Nymph 8 plant CG Medium 20 ft., swim 10 ft.
Fungus Leshy 2 plant N Small 20 ft.
Gearghost 5 undead CE Tiny fly 40 ft. (perfect) Grasping arms emerge from a tangled cluster of debris and mechanical parts. A metal skull hovers...
Gelatinous Cube 3 ooze N Large 15 ft.
Ghonhatine 10 aberration CE Large 40 ft.
Ghorazagh 13 aberration NE Large 40 ft., climb 40 ft., fly 40 ft. (perfect) With an armored spherical body, numerous tentacular legs, and a multi-eyed visage, this...
Ghost Scorpion 1/2 vermin N Small 30 ft.
Giant Centipede 1/2 vermin N Medium 40 ft., climb 40 ft.
Giant Crawling Hand 5 undead NE Medium 30 ft.
Giant Flea 1/2 vermin N Small 30 ft.
Giant Scorpion 3 vermin N Large 50 ft.
Giant Slug 8 vermin N Huge 20 ft.
Giant Termite 3 vermin N Medium 30 ft., burrow 20 ft.
Giant Whiptail Centipede 3 vermin N Huge 40 ft., climb 40 ft.
Gibbering Mouther 5 aberration N Medium 10 ft., swim 20 ft.
Goblin Dog 1 animal N Medium 50 ft.
Goblin Snake 1 aberration CE Small 30 ft., burrow 5 ft., swim 20 ft. A gray, lipless goblin head with serpent’s fangs sits atop the sinuous black body of this...
Gorgon 8 magical beast N Large 30 ft.
Gray Ooze 4 ooze N Medium 10 ft.
Grick 3 aberration N Medium 30 ft., climb 20 ft. This pallid, slimy, worm-like creature is the size of a human, its mouth a sickening tangle of...
Grothlut 3 aberration CE Medium 20 ft.
Gryph 1 magical beast NE Small 30 ft., fly 50 ft. (good) This hawk-sized avian looks much like a six-legged stork. Its feathers are unkempt and greasy,...
Gug 10 aberration CE Large 40 ft., climb 20 ft. This towering menace has a horrible, vertically aligned mouth and arms that split at the elbows...
Hag Eye Ooze 3 ooze N Small 20 ft., climb 20 ft. A single eye stares unblinking from an amorphous blob. A transparent pseudopod extends from the mass.
Half-Fiend Minotaur 6 outsider CE Large 30 ft., fly 60 ft. (average)
Halsora 7 aberration CE Small 30 ft.
Hollow Serpent 16 undead NE Large 50 ft., climb 50 ft. This creature looks like an oversized, empty snakeskin, its body covered in barbs and maw filled...
Hungry Flesh 3 ooze N Large 20 ft., swim 20 ft. A quivering pile of tumorous flesh, this creature leaves a trail of slime as it hungrily...
Hyakume 15 aberration NE Large 30 ft. This bloated creature’s eyes protrude from between the fleshy fat rolls of its neckless, hulking form.
Ice Troll 4 humanoid CE Large 30 ft.
Iku-Turso 8 aberration NE Medium 20 ft., swim 60 ft. This grotesque, emerald-scaled creature resembles a crossbreed of an eel, a viperfish, and a...
Immortal Ichor 17 ooze NE Medium 20 ft., fly 20 ft. (average) This strange—almost beautiful—purple ooze thrums with powerful energy and glows with an eerie light.
Intellect Devourer 8 aberration CE Small 40 ft.
Irnakurse 9 aberration CE Large 10 ft.
Jinkin 1 fey CE Tiny 40 ft.
Kabandha 9 humanoid LN Large 30 ft.
Kobold 1/4 humanoid LE Small 30 ft.
Lampad 5 fey CN Medium 30 ft. Tears stream from this beautiful but sullen creature’s eyes, forming a puddle beneath her delicate feet.
Living Wall 4 construct N Large 10 ft. This gruesome wall is made stacked corpses mortared together into an unyielding mass of grasping...
Lunarma 6 aberration N Medium 0 ft., fly 60 ft. (good) This monstrous crablike creature hovers in midair, its three clawed tentacles snapping aggressively.
Lurker Above 7 aberration N Huge 10 ft., climb 5 ft., fly 40 ft. (poor)
Magma Ooze 7 ooze N Large 10 ft., climb 10 ft. This seething mass of bubbling molten rock churns and moves of its own hungry accord.
Medusa 7 monstrous humanoid LE Medium 30 ft.
Mercane 5 outsider LN Large 30 ft. The tall, blue-skinned humanoid is clad in loose, flowing robes. Its alien face has too many...
Minotaur 4 monstrous humanoid CE Large 30 ft.
Mite 1/4 fey LE Small 20 ft., climb 20 ft.
Mobat 3 magical beast N Large 20 ft., fly 40 ft. (good)
Mongrelman 1 monstrous humanoid LN Medium 30 ft. Ivory tusks, insect chitin, matted fur, scaly flesh, and more combine to form a hideous humanoid shape.
Morlock 2 monstrous humanoid CE Medium 40 ft., climb 30 ft.
Mudlord 6 outsider N Medium 30 ft., swim 40 ft. This fluid creature’s roughly humanoid form is composed entirely of thick gobbets of soggy, brown mud.
Myceloid 4 plant NE Medium 20 ft. This shambling fungus creature bears a strong resemblance to a rotund human, but with a mushroom...
Necrocraft 3 undead NE Medium 30 ft., fly 30 ft. (clumsy) Thick muscle and jutting bone from multiple corpses fused together form a winged, humanlike predator.
Neothelid 15 aberration CE Gargantuan 30 ft., fly 60 ft. (good)
Nuglub 2 fey CE Small 30 ft., climb 20 ft.
Nuno 1/4 fey NE Tiny 20 ft., burrow 10 ft.
Ochre Jelly 5 ooze N Large 10 ft., climb 10 ft.
Ogre Spider 5 vermin N Huge 40 ft., climb 40 ft.
Orc 1/3 humanoid CE Medium 30 ft.
Otyugh 4 aberration N Large 20 ft.
Owb 6 outsider NE Medium 5 ft., fly 60 ft. (perfect) This thing looks like a skeletal human torso coated in liquid shadow, obscuring its bones but...
Pech 3 fey N Small 20 ft. This pale yellow humanoid has blank, bulging white eyes and gangly arms and legs. It clutches a...
Phantom Fungus 3 plant N Medium 20 ft., climb 20 ft. Portions of this three-stalked fungoid monster’s body seem to fade in and out of sight. A large...
Phycomid 4 plant N Small 10 ft. This tangle of purple-capped mushrooms growing out of a nasty green sludge shudders and writhes,...
Purple Worm 12 magical beast N Gargantuan 20 ft., burrow 20 ft., swim 10 ft.
Rat King 5 magical beast N Small 30 ft., climb 15 ft., swim 15 ft. Squeaks and chittering cries rise from a tangle of diseased rats with their tails knotted together.
Redcap 6 fey NE Small 60 ft. Like some miniscule, wicked old man, this snarling little humanoid wears metal boots and a...
Rock Troll 6 humanoid CE Large 30 ft.
Roiling Oil 6 ooze N Large 10 ft., climb 10 ft. This viscous heap slides like an inky spill. It’s the color of a starless night sky, and a thick...
Roper 12 aberration CE Large 10 ft.
Rust Monster 3 aberration N Medium 40 ft., climb 10 ft.
Sabosan 5 monstrous humanoid NE Medium 30 ft., fly 40 ft. (good) This batlike humanoid has a lean, muscular body covered with fur and two large, leathery wings.
Sayona 12 undead CE Medium 30 ft. This revolting withered corpse of a woman is dressed in revealing clothes, its bare skin wet...
Serpentfolk 4 monstrous humanoid NE Medium 30 ft. This serpentine humanoid has bright scaly skin, a long sinuous tail, and a fanged serpent’s head.
Seugathi 6 aberration CE Large 30 ft. This worm-like monster has a hideous face of eyes and hooked jaws. It wields a wand and a sword...
Shadow Roper 13 outsider CE Large 10 ft.
Shard Slag 8 ooze N Huge 30 ft., burrow 20 ft. This smoldering mass of metal-encrusted goo sports half a dozen pseudopods, each tipped with a...
Shoggoth 19 ooze CN Huge 50 ft., climb 30 ft., swim 50 ft.
Skaveling 5 undead CE Large 20 ft., fly 40 ft. (average)
Skulk 1 humanoid CE Medium 30 ft. This smooth-skinned, hairless humanoid has penetrating eyes and skin that shifts and changes to...
Skum (Ulat-Kini) 2 monstrous humanoid LE Medium 20 ft., swim 40 ft.
Slag Giant 7 humanoid LN Large 40 ft.
Slithering Tracker 4 ooze N Small 10 ft., climb 10 ft. A long, moist streak along the dark stone suddenly undulates like a serpent and then rises up to attack.
Slurk 2 magical beast N Medium 30 ft., climb 30 ft. This disgusting beast looks like a slime-covered toad, but with two walrus-like tusks jutting...
Svirfneblin 1 humanoid N Small 20 ft. (15 ft. in armor)
Taniniver 18 dragon NE Huge 30 ft., fly 200 ft. (clumsy) This legless, winged, white-eyed dragon is covered in patches of diseased flesh, squirming with...
Tentamort 4 aberration N Medium 20 ft., climb 20 ft. This dark blue creature has a conical body covered in angry red eyes and numerous tentacles, two...
Termite Swarm 6 vermin N Fine 30 ft., burrow 20 ft. The ground teems with crawling termites, biting and stinging as they come.
Titan Centipede 9 vermin N Colossal 60 ft., climb 60 ft.
Totenmaske 7 undead NE Medium 50 ft. This spindly, skeletal humanoid has moldy green flesh, long talons for hands, and a head that...
Trapper 8 aberration N Huge 10 ft., climb 5 ft.
Troglodyte 1 humanoid CE Medium 30 ft.
Tsaalgrend 2 plant N Small 10 ft., climb 10 ft., fly 40 ft. (poor) Strange, translucent gas bladders carry this tangle of thorny, purple vines and clumps of mold...
Tyrant Jelly 9 ooze N Large 20 ft., climb 10 ft. This amber-colored ooze contains the preserved larva of a giant insect, almost like a monstrous brain.
Vampiric Mist 3 aberration NE Medium fly 50 ft. (perfect) A cloud of crimson vapor reeking of fresh blood hangs in the air, reaching out with lashing claws.
Vegepygmy 1/2 plant N Small 30 ft.
Vemerak 14 aberration CE Huge 40 ft., burrow 20 ft., climb 40 ft. This huge monstrosity seems like some alien, clawed insect, with vaguely humanoid features and...
Vexgit 1 fey LE Tiny 20 ft., climb 20 ft.
Violet Fungus 3 plant N Medium 10 ft.
Wyrwood 1/2 construct N Small 30 ft. Though obviously a wooden construct, this small, nimble creature moves fluidly and purposefully.
Xenopterid 7 vermin N Medium 40 ft., climb 20 ft., fly 20 ft. (clumsy) What appears to be this creature’s cloak unfurls into bug wings, and its apparently human face...
Yellow Musk Creeper 2 plant N Medium 5 ft.