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Gelatinous Cube

Bits of broken weapons, coins, and a partially digested skeleton are visible inside this quivering cube of slime.

Ooze (Gelatinous Cube) CR 3

XP 800
N Large ooze
Init –5; Senses blindsight 60 ft.; Perception –5


AC 4, touch 4, flat-footed 4 (–5 Dex, –1 size)
hp 50 (4d8+32)
Fort +9, Ref –4, Will –4
Immune electricity, ooze traits


Speed 15 ft.
Melee slam +2 (1d6 plus 1d6 acid)
Space 10 ft.; Reach 5 ft.
Special Attacks engulf, paralysis


Str 10, Dex 1, Con 26, Int —, Wis 1, Cha 1
Base Atk +3; CMB +4; CMD 9 (can't be tripped)
SQ transparent


Acid (Ex)

A gelatinous cube's acid does not harm metal or stone.

Engulf (Ex)

Although it moves slowly, a gelatinous cube can simply engulf Large or smaller creatures in its path as a standard action. It cannot make a slam attack during a round in which it engulfs. The gelatinous cube merely has to move over the opponents, affecting as many as it can cover. Opponents can make attacks of opportunity against the cube, but if they do so they are not entitled to a saving throw. Those who do not attempt attacks of opportunity can attempt a DC 12 Reflex save to avoid being engulfed—on a success, they are pushed back or aside (opponent's choice) as the cube moves forward. Engulfed creatures are subject to the cube's paralysis and acid, gain the pinned condition, are in danger of suffocating, and are trapped within its body until they are no longer pinned. The save DC is Strength-based.

Paralysis (Ex)

A gelatinous cube secretes an anesthetizing slime. A target hit by a cube's melee or engulf attack must succeed on a DC 20 Fortitude save or be paralyzed for 3d6 rounds. The cube can automatically engulf a paralyzed opponent. The save DC is Constitution-based.

Transparent (Ex)

Due to its lack of coloration, a gelatinous cube is difficult to discern. A DC 15 Perception check is required to notice a motionless gelatinous cube. Any creature that fails to notice a gelatinous cube and walks into it is automatically engulfed.


As a product of magical experimentation, the gelatinous cube exists in several different varieties.

Ebony Cube CR +2

This creature is a gelatinous cube that has been crossed with a deadly black pudding. Vast cubes of inky slime, they lose their transparent ability, but their acid is more powerful, able to dissolve even metal. Any melee hit or engulf attack deals 1d6 acid damage and the opponent’s armor and clothing dissolve and become useless immediately unless he succeeds on a DC 20 Reflex save. A metal or wooden weapon that strikes an ebony cube also dissolves immediately unless it succeeds on a DC 20 Reflex save. The cube’s acidic touch deals 20 points of damage per round to wooden or metal objects, but the ooze must remain in contact with the object for 1 full round to deal this damage.

Electric Jelly CR +1

This rare variant is capable of producing powerful electrical shocks. It has a purplish sheen, reducing Perception checks to notice it to DC 10. Once every 1d4 rounds, the ooze can generate an electric pulse in a 10-foot radius that deals 1d8 points of electricity damage and stuns creatures for 1 round. A DC 20 Fortitude save reduces the damage by half and negates the stunning effect.

Frost Cube CR +1

This ooze contains floating pockets of symbiotic brown mold. In addition to eating whatever organic materials they pick up, frost cubes feed on warmth and radiate cold. Living creatures within 5 feet of the cube take 3d6 points of nonlethal cold damage per round. Fire brought within 5 feet of a frost cube gives it fast healing 3. It takes +50% damage from cold attacks.

Sorcerer Ooze CR +6

Also called the brain cube, this is perhaps the strangest variant ever reported. Presumably some mad mage or ooze-cultist found a way to transfer humanoid intelligence into the cube’s body as a way of achieving immortality without resorting to undeath, but at the cost of the humanoid’s sanity. Still able to cast spells (using Silent Spell and Still Spell), a typical sorcerer ooze has Intelligence 10, Wisdom 12, and Charisma 18, with the spellcasting ability of a 10th-level sorcerer. Some know the ventriloquism spell, allowing them to communicate with others (though their madness means they eventually attack anyway), but most didn’t plan ahead enough and have been locked inside a gelatinous prison, able only to eat and cast spells, never interacting with intelligent creatures in any meaningful way.


This most commonly encountered variant is gray in color and slightly translucent. A stunjelly looks like a section of dungeon wall 10 feet square, where it waits to engulf passing prey. It has the same paralytic acid as a standard gelatinous cube, and requires a DC 20 Perception check to notice it, but may also be detected by the mild odor of vinegar it exudes.

Pathfinder Chronicles: Dungeon Denizens Revisited. Copyright 2009, Paizo Publishing, LLC; Authors: Clinton Boomer, Jason Bulmahn, Joshua J. Frost, Nicolas Logue, Robert McCreary, Jason Nelson, Richard Pett, Sean K Reynolds, James L. Sutter, and Greg A. Vaughan.

Creating a Gelatinous Cube

A variety of techniques for creating gelatinous cubes and other oozes in a laboratory exist, several of which may be found in an ancient tome called A Treatise on Jellies, Puddings, and Other Dangerous Oozes. One process involves summoned gangs of ooze mephits and lemures, which are transmuted into mindless protoplasm using the flesh to ooze spell. The resulting ooze is then treated with an alchemical concoction of aboleth slime and paralytic chuul extract before being poured into a large, 10-foot-square wooden mold. Kept warm and moist, by the time its acid has dissolved the wooden mold the ooze has solidified and matured into a full-grown gelatinous cube. Despite the extraplanar nature of the creatures used in its creation, the gelatinous cube is not an outsider, although different recipes may create one with the fiendish template.

Dungeon Denizens Revisited. Copyright 2009, Paizo Publishing, LLC Authors Clinton Boomer, Jason Bulmahn, Joshua J. Frost, Nicolas Logue, Robert McCreary, Jason Nelson, Richard Pett, Sean K Reynolds, James L. Sutter, and Greg A. Vaughan.