TEXT: The Deathless Cyst is the greatest achievement of Parnassus, the Biomancer. It is an endless soul receptacle, that allowed
  him to become immortal (at a price). The Cyst often captures and respawns the souls of many unlucky ones, forcing them
  to be reborn in it when they die. It is meant to be used as a "you wake up in this goo" event after a TPK, but remember:
  nothing truly dies here. Any time something dies, its soul is captured back into the Cyst, which spawns a new body for it
  (with a 1-in-6 chance of a random mutation; this mutations stack and every time one is rolled more than once reduce a
  random Ability Score by 1; when ability scores reach 0 players degenerate in a twisted shadow of their former selves).
  They are then reborn 1d3x10 minutes afterwards, naked. Many souls were captured over the years, which resulted in...
  peculiar degenerate creatures roaming this goey place. Can you escape the Deathless Cyst of Doctor Parnassus and its
  terrible marvels, or will you become one of the deformed monstrosities that stalk its bowels?
  CREATURES:
  Unicorns: flaccid, obese and pony-sized, the Unicorns
  of the Cyst are what remains of much nobler creatures
  trapped by it. They feed off nutrients in the ground,
  biting off small pieces of flesh that regenerate almost
  immediately. When hit, they release small toxic clouds,
  very dangerous to predators around. Their horns
  comes easily off their corpses, and can be opened like a
  scroll. They contain 1d4 spell levels worth of a single
  random spell.
  Handmaidens: giant bees with human hands for feet.
  Big as a human torso. They secern a sprinkly blue dust
  from their mouths, that lures their prey. Mostly spend
  their
  time
  grasping
  the
  ceiling
  and
  exchanging
  nutrients with the Cyst. Their barbed stingers ignore
  armor when they drop from above to kill their prey,
  which they eat and feed the Cyst with.
  Silent Watchers: eyes with buglike legs, they scuttle all
  around the Cyst and give off light as a torch. They are
  as big as a Lantern, and don't need to be fueled. Can
  walk on the ceiling and walls. Feed by licking where
  they walk. Docile, can be killed by just squeezing too
  hard. When killed, they contain 1d4-1 small gems,
  which explode when dropped, stunning all those within
  10 feet. In any room, there are d12-6 of them around.
  MUTATIONS:
  Crabby Hands: they work like a Heavy Weapon. You
  can't manipulate anything precisely anymore.
  Skinless Scalp: you can sense anything moving 10 feet
  around you. You take double elemental damage.
  Acidic Soul: you can vomit your own soul, which you
  control and acts as a green slime. You die if you're not
  back to your body in 1 hour.
  Iron Hair: your body is covered in thick hair, that acts
  as Leather Armor. It instantly grows back if burned or
  cut. You can't wear any armor at all, or any clothes for
  that matter.
  Electrical Heart: your heart produces and stores
  electricity. You can use it to attack at will by just
  touching any enemy (damage like a standard weapon),
  but you receive half the damage you inflict.
  Octofeet: your legs now fork off into 8 long, thin and
  extremely movable finger-like appendages. They work
  like Thieves' Tool like a charme, and allow climbing at
  1/2 your normal speed. However they reduce your land
  speed by half and make running impossible.
  Healthy Eater: your ribcage becomes a giant mouth,
  filled with sharp teeth. You can swallow whole
  creatures smaller than you that you grapple, and be fed
  for a week. You can't eat normal food anymore.
  BY BAD WHISKEY GAMES ( HTTPS://BADWHISKEYGAMES.BLOGSPOT.COM )
  
SOURCE: textdata/thevault/One Page Dungeons/OPD The Deathless Cyst by BWG.pdf