[Doesn’t this guy look like he should be fighting Hellboy?
Monster Manual III owed a lot to the Eberron Campaign Setting. It brought the Eberron PC races and living spells into the main product line, and it had a lot of monsters with an Eberron feeling and with Eberron-specific flavor text. One of these turned up in my Sharn Freelance Police game, as a lab assistant transformed into a monster by a mad professor.]
Rot Reaver This hunched and hideous creature looks something
like an ape made entirely out of pulsing, tumorous flesh. Its mouth is
perpetually open and drooling, and two long tongues spool from its mouth and
wind around its arms. Each meaty fist clutches a wicked-looking hatchet.
A rot reaver is a
bizarre, vaguely humanoid creature that feeds on undead beings. Although this might
be seen as beneficial to the living, rot reavers are cruel monsters that
delight in killing in order to animate their prey as zombies. Most rot reavers
surround themselves with an entourage of corporeal undead that they use as
bodyguards, minions and meals. Many sentient undead resent the rot reaver’s
abilities of controlling them, and seek to kill these creatures whenever
possible.
A rot reaver
channels its necromantic powers through its tongues, using these disgusting
organs to rot the flesh of the living and drain the energy of the dead. Rot
reavers typically wind these organs around and through their arms. They then
use them to lick at their foes while attacking them with their bare hands or,
more frequently, magically empowered butcher’s knives. This favor for cleavers
has led some sages to speculate that rot reavers are the creation of some god
of gluttony and undeath. For their own part, rot reavers are rarely devout,
caring more for where their next meal is coming from than matters of faith.
A rot reaver
typically moves on all fours, walking on its knuckles, but stands six feet high
when rearing on its back legs.
Necrothanes The greatest of
the rot reaver species, necrothanes are stronger and smarter than their peers,
and typically wear heavy armor emblazoned with symbols of undeath. A necrothane
is a rot reaver with the advanced and fighter simple templates, and is a CR 9
creature.
Shores of Swords 