Poisonous fungus that releases deadly spores when disturbed

If disturbed, a patch of this mold bursts forth with a cloud of poisonous spores. Each patch covers from 10 to 25 square feet; several patches may grow adjacent to each other, and will appear to be a single patch in this case. Each patch can emit a cloud of spores once per day. All within 10 feet of the mold will be affected by the spores and must save vs. Death Ray or take 1d8 points of damage per round for 6 rounds. Sunlight renders yellow mold dormant.

Deadly fungus that covers walls, ceilings, and other surfaces

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

Deadly fungus that covers walls, ceilings, and other surfaces

When touched, yellow mould releases spores in a 10-ft cubed choking cloud. Any creature within this area will die unless it successfully saves vs poison; a character who fails his or her save will require a cure disease and resurrection to be made whole again. If a surface covered in yellow mould is handled roughly, there is a 50% chance spores will be released in such a cloud. Yellow mould is susceptible only to fire and fire attacks. A continual light spell will force the mould to go dormant for 2d6 turns until it covers the light source.