Creatures of FASA

FASA 365 Day 96, Beware of puddles in the dungeon. Reeking of rot and decay. a gelatinous ooze of what was once human.
This is a creature of despair, immortal, unable to maintain any semblance of its original form for more than minutes at a time.
Fully aware, unable to decompose; let alone die, it drags its mass through the dungeon infecting others if it can and adding them to the sludge that is himself.
He is… the Creeping Crud.