Extreme cold or heat, sunlight, or a remove disease spell destroys a patch of green slime. Against wood or metal, green slime deals 2d6 points of damage per round, ignoring metal's hardness but not that of wood. It does not harm stone. If disturbed, a patch of this mold bursts forth with a cloud of poisonous spores. Fire destroys yellow mold, and sunlight renders it dormant.
Brown mold feeds on warmth, drawing heat from anything around it.
It normally comes in patches 2 to 3 feet in diameter, and the temperature is always cold in the area surrounding it. Living creatures within 5 feet of it take 3d6 points of cold subdual damage. Fire brought within 5 feet of the mold causes it to instantly double in size. Cold damage, such as from a cone of cold, instantly destroys it. This strange underground fungus grows in patches that look almost like stunted shrubbery.