This creature is found around swamps and very wet areas, they are up to a
foot in length. They move around only at night, unless disturbed. They exude
a saliva that deadens the nerves in living flesh, so that when they bite it
is not felt by the victim.
Every hour they feed reduces the targets CON by 1pt, which can be recovered by
a weeks worth of total bedrest and medical care per point of CON lost.

They have negligible stats and have only a single hit point.