Huge monstrosity, chaotic evil

Armor Class 18 (natural armor)
Hit Points 80 (10d12+15)
Speed 10 ft.

18 (+4) 10 (+0) 15 (+2) 11 (+0) 16 (+3) 7 (-2)

Skills Stealth +6, Perception +6
Damage Resistances fire, bludgeoning
Condition Immunities deafened, blinded
Senses blindsight 60 ft., tremorsense 120 ft., passive Perception 16
Languages Understands common and sylvan but does not speak
Challenge 5 (1,800 XP)


  • Improved Spell Resistance. The moundule makes saving throws against spells at advantage.
  • Naturally Stealthy. The moundule adds double its proficiency bonus to stealth checks.


  • Multiattack. The Moundule attacks twice with its slam attack.
  • Slam. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 16 (3d8+4) bludgeoning damage.


Monstrous tree-things. The moundule are large creatures that inhabit swamps, riverbanks, bogs, forest ponds, and similar bodies of water. At first glance, they might resemble a small ent, but they are an entirely different species altogether, and completely evil. The moundule stands upon two short, squat legs. Its feet are more akin to tree stumps with no toes or nails. Its arms, however, are long and end in equally brutish stumps. Root-like protrusions cover the beast’s whole body, hanging anywhere from a few inches to several feet. These “roots” are highly sensitive and through them, the moundule is able to sense what is going on around him. The beast has no eyes, ears, or nose. They range in colors from brown to gray and green, depending on which portion of the swamp they inhabit.

Silent killers. The moundule rarely move, finding a comfortable spot to sink into and remaining there until they die. The moundule sinks into the muck, its head, arms, and legs lost to sight. Its huge back protrudes from the water, offering would-be travelers a safe, dry place to rest. It is not uncommon for small trees, swamp grass, and other vegetation to grow upon them. They do not breathe, but rather take in energy from the sunlight, much as a plant does. The area around the moundule is always strewn with debris from its past kills, whether bones or riches. These are not always easy to see of course, as they sink into the muck and sour that is the moundule’s bed.

Vicious predators. Highly predacious, they attack almost anything that crosses over their mound. They wait until the unsuspecting victim settles upon its back and then rise suddenly from the swamp throwing off the passerby and into the muck. They then swing their trunk-like arms like clubs, battering the life out of the unsuspecting creature. Once they have killed their prey, they pull the body underneath them and sink down on top of it so that the victim fertilizes the creature’s roots.

Section 15: Copyright Notice

5th Edition Monsters & Treasure of Airhde, 1st Printing, Copyright 2021, Troll Lord Games; Author Stephen Chenault & Jason Vey

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