Cleon
Legend
I agree with all that.
Revising...
Slime Mold Sporocarp (CR X)
A mature sporocarp resembles a large, dried out mushroom about 10 feet tall. The head of the "mushroom" is hollow and filled with spores about an inch long. A dry sporocarp has vulnerability to fire. It is AC 1, hardness 5, and takes 120 hit points of damage to destroy, but any weapon damage which does not destroy the sporocarp causes it to split open and release its spores. The spores scatter in a cloud covering a 30 foot radius and attach themselves to any organic matter they touch (including living creatures), which they immediately start to digest, doing 1 point of Constitution damage per round. On the first round of contact, the spores can be scraped off a creature (possibly destroying the scraping device), but after that it must be frozen, burned, or cut away (dealing damage to the victim as well). Anything that deals cold or fire damage, sunlight, or a remove disease spell destroys a spore infestation.
Partially developed sporocarps are soggy and covered with damp mucus, giving them fire resistance 5. Such a sporocarp poses no threat, since its spores are not ready to reproduce.