FREQUENCY: Rare ([Temperate Wilderness Swamp], [Tropical Wilderness Swamp])
FREQUENCY: Rare ([Dungeon Level VII])
 

NO. APPEARING: 1-3
ARMOR CLASS: 0
MOVE: 6"
HIT DICE: 8-11
% IN LAIR: 30%
TREASURE TYPE: [B], [T], [X]
NO. OF ATTACKS: 2 ~ 12 (8-9 HD) or 10 (10-11 HD)
DAMAGE/ATTACK: 2-16/2-16
SPECIAL ATTACKS: Suffocation
SPECIAL DEFENSES: Partial magic and spell immunity
MAGIC RESISTANCE: See below
INTELLIGENCE: Low
ALIGNMENT: Neutral
SIZE: L
LEVEL/X.P. VALUE: VII | 1800 + 10

Shambling mounds, or "shamblers," are found in dismal marshes or
certain wet subterranean places. They are omnivorous, feeding upon any
living material (via their weird roots and tendrils).

They attack fearlessly,
clubbing with their limbs twice per melee round.

Suffocation: If both of a shambler's
clubbing attacks hit a single opponent, the victim is entangled and will be
suffocated in the creature's slime in 2-8 melee rounds unless the creature
is killed.

The brain of the shambler is located in its mid-portion, and its thick fibrous
layers make it difficult to penetrate to its only vital area. In fact, most hits
upon it do but little damage (thus AC 0). As it is wet and slimy, fire
has no effect, lightning causes it to grow (add 1 HD), and cold does
either one-half or no damage due to its vegetable constitution. All
weapons score only one-half damage. It can flatten itself, so that crushing
has small effect. Spells which affect plants are effective against shambling
mounds, plant control and charm plant being good examples.

Description: Appearing as a heap of rotting vegetation, the shambler is
actually an intelligent form of vegetable life. It is generally from 6' to 9' in
height, with a girth of about 6' at its base and 2' at its summit.

-

PapersAndPaychecks wrote:
Umber hulks.
 

Ah well, that's another original I created, as are ropers and shambling mounds, the latter inspired by The Heao from the old Airboy comics I loved dearly as a lad.

Something similar could be done, with a different name and appearance and modes of attack and defense, but that rather contradicts the purpose,

Cheers,
Gary