Gray ooze

A gray ooze was a type of ooze.

Description
It was a thick puddle of gray sludge, roughly 8 inches (20 centimeters) and up to 14 feet (4.27 meters) across, that closely resembled wet stone or an amorphous rock formation.

Ecology
They consumed any organic matter they encountered.

Lairs
Gray ooze was a living form of slime that slinked through cold swamps and marshes. They could also be found in 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.

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

Combat
While possessing an immunity to magic, fire, and cold, the gray ooze couldn't speak. It attacked by striking until its prey was either dead or unconscious, moving on top of them afterwards to digest them from within. 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. Gray oozes were particularly feared for the fact that they were transparent. This mades them difficult to detect while they were still or moving slowly.

Appearances

 * Adventures:
 * ... And a Dozen Eggs
 * Curse of Strahd
 * Out of the Abyss
 * Waterdeep: Dragon Heist
 * Video games
 * Baldur's Gate II: Shadows of Amn