Yellow Mould

Deadly fungus that covers walls, ceilings, and other surfaces.

ACNo hit roll required, HD2* (9hp),
Att 1 × spores (1d6 + choking), THACO 18 [+1],
MV 0’ (0’), SV D12 W13 P14 B15 S16 (2),
ML 12, AL Neutral, XP 25, NA 1d8 (1d4),

• Area: Each 10 square feet (e.g. 2’ × 5’) covered in yellow mould is treated as one “individual”. (A 10’ × 10’ area would consist of 10 individual moulds.)
• Immunity: Unharmed by all attacks but fire (a burning torch does 1d4 damage).
• Spore cloud: 50% chance of attacking if touched (or damaged): releases a cloud of spores affecting all within a 10’ cube area.
• Choking: Save versus death or die within 6 rounds.
• Erosion: Wood or leather in contact with the mould will be eaten away.

Source: Classic Fantasy