Green slime (Dungeons & Dragons)

In the Dungeons & Dragons fantasy role-playing game, the green slime is an ooze, a category of monster. It is more akin to a plant than an animal. It is a horrible, fetid growth, resembling a bright green, sticky, wet moss which grows on the walls and ceilings of caves, sewers, dungeons, mines, and the like.

It has been suggested that many of these fantasy creatures were inspired by Georg Agricola's curious work "De animantibus subterraneis", in which this early German mineralogist considered a wide range of real and imaginary subterranean creatures. Some of these might have been inspired by cavers' contacts with peculiar lifeforms in caves with a high hydrogen sulfide and sulfuric acid content which are even more corrosive than the environments they inhabit, such as the "snottites", "red goo", and "green slime" encountered in the real-world Cueva de Villa Luz.

Characteristics and habits
The green slime is notably different from other oozes. Being a growth, it is fixed to one place and cannot move or attack. For the most part, it is forced to feed off of vegetable, organic or metallic substances in an underground wall. If it grows on a ceiling, however, it can sense if someone passes below, and drops onto them. Living creatures touched by a green slime eventually turn into green slime themselves. Green slime is vulnerable to light, heat, frost, and cure disease spells.

Green slimes are mindless and cannot speak. As such, they are regarded as neutral in alignment.

A green slime will regrow if even the tiniest residue remains, and can germinate to form a full sized ooze again years later. In the Dungeons & Dragons universe, huge colonies of green slime exist deep beneath the earth.