Spirit moss is a pale white moss that grows on dead trees in swampy environments. When living creatures approach, it thrashes violently, causing creatures to become entangled. The moss implants spores into snared creatures that can cause complete immobilisation, the victim simply moaning gently, which whittles down the creature over a period of days, finally resulting in death. Spirit moss can be destroyed by fire, and the spores themselves can be destroyed in the same way, curing the vicitm. Alternatively the disease can be removed with remove disease or similar effects.