There are hundreds of different Mouldkin strains in the sewerscape, but none more common than the insidious Mouldwight.  Shambolic husks reanimated by the fungi that infest them, Mouldwights appear as near-skeletal corpses covered in fruiting bodies, their skulls often crowned by a prodigious mushroom-cap or cluster of puffballs (depending on subspecies).  Displaying rudimentary intelligence and an alien, predatory cunning, Mouldwights roam the tunnels below in search of additional carcasses to colonize.  If they come across living beings they do not hesitate to attack, breathing clouds of toxic spores which, if inhaled, infect a host and slowly eat away at them from the inside-out, necrotizing their organs and spreading beneath their flesh, finally bursting through their skin in a horrific profusion of caps, stalks, and toadstools.  Many Mouldwights also possess lash-like, cankerous tendrils they use to pull victims towards them in order to administer their corruptive exhalations.  Mouldwights rapidly decompose their host bodies, however, and eventually the decayed remnants of their hosts simply collapse.  The Mouldwight fungi linger for a short while before withering and dying, unless a new host wanders by in the meantime.  Because Mouldwights can reproduce quickly they frequently form packs, coordinating their efforts to trap would-be prey – presumably the creatures communicate using spores since, unlike some Mouldkin, Mouldwights do not speak.  They are highly vulnerable to fire, sunlight, and fungicides, and prefer the dampest, darkest areas of the tunnels – fortunately for them, such areas are common in the mildewed labyrinth of the sewerscape.