The PCs are traveling near a river or through mountainous terrain when they find themselves in a thick fog. As they venture further, they come to a bridge. With no sign of alternate routes, they must make their way across. The bridge is an illusion generated by a predatory monster called a chosis mimic – a psychic creature that feeds on the life spirit of those traveling near it. The illusionary bridge has no beginning and no end, and no matter how long the PCs travel, they never reach its end before they reach theirs – unless they destroy the chosis mimic! (level 4)