Rotting Shambler

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Large Plant, Neutral

Armor Class 14 (natural armor)

Hit Points 85 (10d10+30)

Speed 30 ft.

STR 18 (+4)

DEX 6 (-2)

CON 17 (+3)

INT 1 (-5)

WIS 12 (+1)

CHA 1 (-5)

Saving Throws Con +6

Damage Vulnerabilities fire

Damage Resistances bludgeoning; piercing; slashing

Condition Immunities charmed, frightened, paralyzed, poisoned

Senses blindsight 60 ft., passive Perception 11

Languages —

Challenge 5 (1,800 XP) Proficiency Bonus +3

Engulf. The Rotting Shambler can engulf creatures it has grappled. An engulfed creature is restrained and takes 14 (4d6) acid damage at the start of its turn. A creature can escape the engulfed condition by succeeding on a DC 16 Strength check.

Amorphous. The creature can move through a space as narrow as 1 foot wide without squeezing.

Regeneration. The creature regains 5 hit points at the start of its turn if it has at least 1 hit point.

Actions

Multiattack. The Rotting Shambler makes two Slam attacks.

Slam. Melee weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 16 (2d10+5) bludgeoning damage. If the target is a Medium or smaller creature, it must succeed on a DC 16 Strength saving throw or be grappled.

Fungal Cloud. The Rotting Shambler releases spores in a 15-foot radius. Creatures in that area must succeed on a DC 15 Constitution saving throw or become poisoned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Environment Forest, Swamp

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Lore & Description

Appearance

The Rotting Shambler is a large mass of decaying leaves, tangled roots, and dripping slime. Its surface is covered in a patchwork of mold and fungi, emitting a foul odor that can be detected from far away. It shifts and writhes as if something within it stirs.

Behavior & Origins

The Rotting Shambler thrives in decaying woodlands and wetlands, feasting on plant matter and unsuspecting creatures that wander too close. It is a guardian of rotting ecosystems, acting in defense of its territory with an unrelenting drive to engulf and digest intruders. Some say that encountering a Rotting Shambler is a portent of misfortune, as they appear in areas where death and decay are prevalent.

Monster Image

Generation Info

Original prompt:
"A shambling mound of rotting vegetation"

Created: Jan 28, 2026
Modified: May 30, 2026