5e SRD >Creatures >

Marsh Hulk

Large fiend, chaotic evil

Armor Class 16 (natural armor)
Hit Points 147 (14d10 + 70)
Speed 30 ft., swim 30 ft.

22 (+6) 16 (+3) 20 (+5) 9 (-1) 16 (+3) 14 (+2)

Skills Athletics +10, Perception +7, Stealth +7, Survival +7
Damage Vulnerabilities thunder
Damage Immunities poison; bludgeoning, piercing, and slashing from nonmagical attacks
Condition Immunities poisoned
Senses darkvision 90 ft., passive Perception 17
Languages Common, Infernal
Challenge 10 (5,900 XP)


  • Amphibious. The Marsh Hulk can breathe air and water.
  • Horrific Appearance. Any humanoid that starts its turn within 30 feet of the Marsh Hulk and can see him must make a DC 14 Wisdom saving throw. On a failed save, the creature is frightened for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If the target’s saving throw is successful or the effect ends for it, the target is immune to the Marsh Hulk’s Horrific Appearance for the next 24 hours.
  • Sunlight Sensitivity. While in direct sunlight, the Marsh Hulk has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.
  • Swamp Camouflage. The Marsh Hulk has advantage on Dexterity (Stealth) checks made to hide in swampy terrain.


  • Multiattack. The Marsh Hulk makes three attacks: one with its bite and two with its fists.
  • Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 29 (4d10 + 6) piercing damage, Fist. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 4 (3d8 + 6) bludgeoning damage. Any Medium or smaller target is also grappled (escape DC 17). The Marsh Hulk can grapple one Medium or smaller creature with each hand.


Marsh hulks were exiled to Hell many years ago by a powerful paladin. It is an ugly, loathsome fiend bent on revenge. Even the sight of the monster causes most creatures to flee.

Party Crasher. Perpetually angry and resentful, this fiend hates celebrations of any kind. It will creep into these joyous events and viciously attack all the participants.

Home Cooking. The tormented fiend still lives at home with its mother. They live in an underground cave near a gloomy swamp. The two fiends swim through the murky waters and search for prey.

Section 15: Copyright Notice

Monsters of the Wilderness: A Collection of Monsters for 5th Edition Copyright 2022 Cawood Publishing Author Andrew Cawood

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