Wizards of the Coast. Accessed via the Libris Mortis Art Gallery here
[The first of the necromentals I actually converted]
Dessicator
This shriveled humanoid creature has merely a gaping maw for a face.
Its body is lined with cracks, as if it were severely dehydrated.
Dessicators are the least of the necromentals, but make up for this
weakness with sheer numbers. They are vermin of the least trafficked
regions of the Plane of Water, ganging up on unwary water elementals or
mortals and draining them of their precious bodily fluids. Despite their
awkward appearance, they are incredibly graceful in the water. On the
Material Plane, dessicators gather near water in deserts, hoping to
drain the last precious morsels of water from those already suffering
from thirst.
Shores of Swords 