Mold

Molds are not part of the class of monster represented by the overall symbol F, in addition to lichens, violet fungi, and shriekers. They come in several colors, and each possesses a specific passive attack.

Brown mold

F brown mold
Difficulty	2
Attacks	passive cold

F brown mold
Difficulty	2
Attacks	passive cold
Base level	1
Base experience	9
Speed	0
Base AC	9
Base MR	0
Alignment	0 (neutral)
Frequency (by normal means)	Very rare
Genocidable	Yes
Weight	50
Nutritional value	30
Size	Small
Resistances	Cold, poison
Resistances conveyed	Cold (3%), poison (3%)
A brown mold: does not breathe. cannot pick up items. has no eyes. has no limbs. has no head. is mindless. does not eat. (*) is neither male nor female. is normally generated hostile.
Reference	monst.c#line1404

The brown mold's passive attack causes cold damage.

Eating a brown mold corpse is harmless and has a 3% chance to grant you poison resistance.

Repeatedly attacking a brown mold can cause it to multiply due to your body heat.

Green mold

F green mold
Difficulty	2
Attacks	passive acid

F green mold
Difficulty	2
Attacks	passive acid
Base level	1
Base experience	9
Speed	0
Base AC	9
Base MR	0
Alignment	0 (neutral)
Frequency (by normal means)	Very rare
Genocidable	Yes
Weight	50
Nutritional value	30
Size	Small
Resistances	Acid, petrification
Resistances conveyed	None
A green mold: does not breathe. cannot pick up items. has no eyes. has no limbs. has no head. is mindless. does not eat. (*) is neither male nor female. is normally generated hostile.
Reference	monst.c#line1419

The green mold's passive attack causes acid damage.

Red mold

F red mold
Difficulty	2
Attacks	passive fire

F red mold
Difficulty	2
Attacks	passive fire
Base level	1
Base experience	9
Speed	0
Base AC	9
Base MR	0
Alignment	0 (neutral)
Frequency (by normal means)	Very rare
Genocidable	Yes
Weight	50
Nutritional value	30
Size	Small
Resistances	Fire, poison
Resistances conveyed	Fire (3%), poison (3%)
A red mold: does not breathe. cannot pick up items. has no eyes. has no limbs. has no head. is mindless. does not eat. (*) is neither male nor female. is normally generated hostile. can be seen through infravision.
Reference	monst.c#line1426

The red mold's passive attack causes fire damage.

Yellow mold

F yellow mold
Difficulty	2
Attacks	passive stun

F yellow mold
Difficulty	2
Attacks	passive stun
Base level	1
Base experience	8
Speed	0
Base AC	9
Base MR	0
Alignment	0 (neutral)
Frequency (by normal means)	Quite rare
Genocidable	Yes
Weight	50
Nutritional value	30
Size	Small
Resistances	Poison
Resistances conveyed	Poison (7%)
A yellow mold: does not breathe. cannot pick up items. has no eyes. has no limbs. has no head. is mindless. is poisonous to eat. does not eat. (*) is neither male nor female. is normally generated hostile.
Reference	monst.c#line1412

The passive attack of the yellow mold stuns you for a number of turns. It is poisonous and hallucinogenic if eaten.

Strategy

If you lack the resistance required to neutralise the passive attack, it is best to let your pet attack the mold, attack it with a ranged weapon, or leave it alone. Molds will never move or actively attack you.

SLASH'EM

SLASH'EM features two new types of mold: the black mold and the disgusting mold. Their passive attack causes poison damage by way of spores; a nonbreathing character will be unaffected.

In both NetHack and SLASH'EM, the mold sometimes leaves a corpse. In SLASH'EM, the corpse might revive itself ("The yellow mold rises from the dead!"). Also in Slash'EM, molds may grow on rotting corpses, taking the name of the corpse if it is named (which can result in some unexpected messages, especially in graveyards).

Encyclopedia entry

Mold, multicellular organism of the division Fungi, typified
by plant bodies composed of a network of cottony filaments.
The colors of molds are due to spores borne on the filaments.
Most molds are saprophytes.  Some species (e.g., penicillium)
are used in making cheese and antibiotics.
        [ The Concise Columbia Encyclopedia ]