A Bile Golem looks like a human turned inside out, or an autopsy gone horribly wrong. It has no eyes or other recognizable external features. It is in fact a flesh golem variant made entirely of internal organs sewn together in seemingly random fashion to form a roughly humanoid shape. These external internal organs undulate and pump, giving the appearance they are all functioning as if they were still part of the original body from which they were harvested. The pumping causes highly caustic bile to exude from all the organs.
Alkali Fluid (Ex): The organs that make up the body of a Bile Golem exude caustic bile that burns organic and metal materials on contact. This black and green fluid causes 3d6 points of base (new weapon) damage on a successful melee hit to any organic material (flesh, leather, wood, etc.). Metal objects suffer 30 points of damage per round from the Bile Golem’s touch. Armor and clothing become instantly useless unless their wearer succeeds a Reflex save (DC 20). A metal or wooden weapon that strikes a Bile Golem dissolves in 1d4 rounds unless it succeeds a Reflex save (DC 20). The bile cannot affect prescious metals, such as gold and silver, or gems.
Gruesome Stench (Ex): The stench from a Bile Golem is equivalent to a cadaver that has been left in the sun for a few days. The odor is discernable within a 30-ft. radius and all who fail their Fortitude save (DC 15) are nauseated (DMG Condition Summary) for 1d4 rounds.
Magic Immunity: Bile golems are immune to all magic, except as noted hereafter. Fire and cold-based effects slow them (as a slow spell) for 2d6 rounds with no saving throw. Electricity cures 1 point of damage for each 3 points of damage it would have dealt. Magic based on alignment (i.e. protection from evil, holy word, etc.) can affect or harm a Bile Golem.
The internal organs used to create a Medium size Bile Golem must come from normal human or humanoid corpses that are harvested alive. Assembling the body requires a minimum of four different bodies, but there is no particular pattern the organs are required to be assembled in.
A Bile Golem costs 70,000 gp to create, which includes 1,000 gp for construction of the body. Assembling the body requires a successful Craft (leatherworking) or Heal check (both at DC 17).