Terrain: Any water
Frequency: Rare
# Appearing: 1
This terrible creature is believed to have been conjured
from the twisted mind of some long-dead sage. Frequently,
unsuspecting victims of the cistern fiend think they have
found a safe or unguarded water supply; this is usually
their last conscious thought.
The cistern fiend appears as a giant, vaguely green but
translucent worm with a great mass of coiling pinkish
tentacles surrounding a hideous mouth. The cistern fiend
is virtually invisible when totally submerged in water.
The creature’s size depends on its age and the amount
of water available, but most cistern fiends average 40’ to
50’ in length.