Entity: Oozemorph

May contain spoilers from The Slithering

Source The Slithering pg. 59

You have suffered from the deadly touch of an ooze or other amorphous creature, like a gibbering mouther or a shoggoth, and have come away changed. Alternatively, you might have been exposed to some alchemical accident involving experiments with oozes, such as those performed in the city of Oenopion in Nex. Parts of your body occasionally liquefy and threaten to slough off, and only through force of will can you keep your natural form intact. Your affliction is plainly supernatural in origin and distressingly permanent.