This is the lair of the will-o-wisp (from 2).
The aged creature's treasure consists of only
2 items: a human skull and a rusty dagger.
(Over the years, the sandling has corroded
and destroyed the wisp's other
possessions.) The skull can be thrown with
the same range and damage as a club, but it
is useless as a hand-to-hand melee..weapon.
The lower jaw of the skull is missing. The
rusted dagger has a 35 % chance per successful
hit of snapping off at the hilt.

>>5.