Gray ooze

A gray ooze was a type of ooze, resembling wet stone or rock.

Description
It was a thick puddle of gray sludge, roughly thick,  wide, and up to  across, that closely resembled wet stone or an amorphous rock formation.

Behavior
When one of these creatures reached an exceptionally large they were known to mildly develop greater intellect.

Biology
These creatures could corrode metal at a rate comparable to that of a black pudding, though its acids could not eat through stone or wood.

Gray oozes reproduced by breaking small droplets off of them after a meal, called 'budding', which later grew into gray oozes themselves.

Abilities
Gray oozes possessed an innate immunity to magic, as well as severe heat and cold. However, they were vulnerable any form of lightning. They also had the ability of Blindsight.

When one of these creatures reached an exceptionally large they would develop latent psionics, allowing them to unleash a psychic crush, but in return be left vulnerable to retaliation. They were only known to unleash this ability whenever a creature within of them used psionic powers. It was suggested that gray oozes developed these psionic abilities having evolved to live near Mind flayers.

Combat
Gray oozes were known to attack in groups, dissolving enemies and absorbing their bones as slime to grow. It attacked by striking until its prey was either dead or unconscious, moving on top of them afterwards to digest them from within. Gray oozes were particularly feared for the fact that they were transparent. This made them difficult to detect while they were still or moving slowly.

Acidic secretions of the gray ooze corroded metal at an alarming rate ; as a result, blacksmiths also sometimes used jarred gray oozes to meld ore into the right shape.

Habitats
Gray oozes were known to be found in subterranean areas, such as caverns and dungeons. They were mindless scavengers who dragged themselves around caves or sewers, while absorbing and digesting whatever they came across. Unlike other oozes, the gray variety couldn't move on ceilings or walls, hence it was left to slide its way along subterranean floors.

In the Abyss, gray oozes could be found in Shedaklah, the Slime Pits, 222nd layer of the Abyss.

Appearances

 * Adventures:
 * Dungeon #30 ... And a Dozen Eggs • Curse of Strahd • Waterdeep: Dragon Heist • Waterdeep: Dungeon of the Mad Mage
 * Video games
 * Baldur's Gate II: Shadows of Amn • Neverwinter Nights: Darkness over Daggerford
 * Card Games
 * Sword Mountains Crypt
 * Gamebooks
 * Escape the Underdark
 * Organized Play & Licensed Adventures
 * Curse of Strahd • Out of the Abyss