Bête pourrissante du marais - the Black Bête

Bête pourrissante du marais, aka Black Bête

Large Plant

Hit Dice: 5d8+10 (32 hp)
Initiative: +0
Speed: -- ft. (cannot move)
Armor Class: 14 (+4 natural), touch 10, flat-footed 14
Base Attack/Grapple: +3/+6
Attack: Slam +6 melee (1d6+3 plus grab)
Full Attack: 2 slams +6 melee (1d6+3 plus grab)
Space/Reach: 5 ft./10 ft.
Special Attacks: Grab, constrict, sap lure
Special Qualities: Plant traits, tremorsense 60 ft., damage reduction 5/slashing, vulnerability to fire, swamp-bound vitality, semi-sentient
Saves: Fort +6, Ref +1, Will +2
Abilities: Str 16, Dex 10, Con 14, Int 3, Wis 10, Cha 8
Skills: Listen +5, Spot +5, Hide +2 (in swamp)
Feats: Alertness, Endurance, Improved Initiative
Environment: Warm swamps and marshes
Organization: Solitary
Challenge Rating: 3
Treasure: None
Alignment: Always neutral evil

Description

The Bête pourrissante du marais, also known as the Black Bête, is not an aberration from beyond the world, but rather a corruption that grows within it. It appears as a bald cypress in its final, rotting state - its bark split and peeling, its trunk swollen with decay, and its roots knotted above the water like grasping limbs that refuse to release their hold on life. Its canopy is sparse and sickly, draped in dead moss and brittle growth, yet faint movement can sometimes be seen in its branches, as though the tree itself is struggling to continue breathing.

Unlike a truly dead tree, the Bête has not fully surrendered to decay. Instead, it lingers in a state between life and death, sustained by the swamp’s slow, pervasive necrotic influence. The swamp does not simply consume - it transforms. The Bête embodies this process, feeding on rot, stagnation, and the faint traces of death that linger in the air and water around it. Wildlife instinctively avoids it, and even insects seem reluctant to settle near its roots.

Combat

The Bête pourrissante du marais is an ambush predator, though it does not hunt in the traditional sense. Instead, it lures creatures through subtle stimuli - a slow drip of sap, the faint scent of decay, or the illusion of a safe resting place. When prey draws near, its limbs lash out with surprising speed, attempting to seize and crush the life from its victims.

It prefers to attack solitary or weakened targets, relying on patience rather than aggression. If faced with sustained resistance, it does not flee, but instead withdraws slightly into stillness, relying on concealment and the swamp itself to obscure its presence until another opportunity arises.

Special Attacks

Grab (Ex):
If the Bête hits with a slam attack, it can attempt to start a grapple as a free action without provoking an attack of opportunity.

Constrict (Ex):
On a successful grapple check, the Bête deals 1d6+3 points of damage with a successful grapple check.

Sap Lure (Su):
Once per encounter, the Bête exudes a slow, thick sap that drips from its bark, releasing a faintly sweet but unsettling scent. Creatures within 30 feet must succeed on a DC 12 Will save or be compelled to approach the tree for 1d4 rounds, drawn by an instinctive sense of shelter or curiosity. This is a mind-affecting compulsion effect. The save DC is Charisma-based.

Special Qualities

Plant Traits:
The Bête is immune to poison, sleep, paralysis, stunning, and polymorph effects. It is not subject to critical hits or mind-affecting effects.

Tremorsense (Ex):
The Bête can detect the location of anything within 60 feet that is in contact with the ground or swamp water.

Damage Reduction (Ex):
Damage reduction 5/slashing. Its dense, rotting wood resists blunt trauma and absorbs impacts unnaturally well.

Vulnerability to Fire (Ex):
Fire deals +50% damage to the Bête.

Swamp-Bound Vitality (Ex):
Though immobile, the Bête draws strength from the swamp itself. In areas of deep marsh or standing water, it gains a +2 circumstance bonus to saving throws against being affected by any effect that would damage or destroy plants. In addition, it is difficult to distinguish from a normal, dying cypress at a distance (DC 15 Spot check to notice its unnatural state when not in combat).

Lore

The Bête pourrissante du marais is believed to be a consequence of the swamp’s natural cycle taken to a disturbing extreme. Where most trees decay and return to the earth, the Bête lingers - sustained by the dense, stagnant magic that permeates the land. It is not raised by necromancy in the traditional sense, nor is it animated by outside will. Rather, it is what happens when life refuses to end, feeding instead on the slow accumulation of death around it.

Many locals avoid areas where these trees grow, referring to them in hushed tones and marking their locations with crude warnings. To approach one is to risk becoming part of its continued existence - another body consumed, another source of sustenance in its endless, quiet hunger. For most, the safest choice is simple: avoid the still places, where the swamp grows too quiet… and the trees begin to listen.

These trees are said to be... extensions... of the loa also known as Black Bête. Servants of that malevolent loa will chant and sing to these awful plants in an attempt - although an often vain one - to contact the monstrous loa itself.

Black Bête Chant (Swamp Version)

Oh, Black Bête (bam-ba-lam)
Deep in the mire (bam-ba-lam)
Black Bête waits (bam-ba-lam)
Rotting desire (bam-ba-lam)
It calls you nearer (bam-ba-lam)
Cold breath, you hear it (bam-ba-lam)
Oh, Black Bête (bam-ba-lam)
Don’t go near it (bam-ba-lam)

Whoa, Black Bête (bam-ba-lam)
Yeah, Black Bête (bam-ba-lam)
Bark like sickness (bam-ba-lam)
Roots hold fast (bam-ba-lam)
It pulls you under (bam-ba-lam)
Time goes faster (bam-ba-lam)
Whoa, Black Bête (bam-ba-lam)
Won’t let you pass (bam-ba-lam)

Whoa, Black Bête (bam-ba-lam)
Yeah, Black Bête (bam-ba-lam)
Eyes in the bark (bam-ba-lam)
Hungry and dark (bam-ba-lam)
If you get closer (bam-ba-lam)
There’s no turning back (bam-ba-lam)
Whoa, Black Bête (bam-ba-lam)
Never come back (bam-ba-lam)

(This is obviously a parody of the song Black Betty)