Bilge Gremlin Bosun

Family: Gremlins

Small fey, neutral evil

Armor Class 15 (natural armor)
Hit Points 60 (11d6 + 22)
Speed 30 ft., climb 20 ft., swim 30 ft.

10 (+0) 18 (+4) 14 (+2) 14 (+2) 11 (+0) 14 (+2)

Skills Sleight of Hand +6, Stealth +6
Damage Immunities poison
Condition Immunities poisoned
Senses darkvision 120 ft., passive Perception 10
Languages Aquan, Sylvan
Challenge 2 (450 XP)
Proficiency Bonus +2


  • Amphibious. The bilge gremlin can breathe air and water.
  • Aura of Mechanical Mishap. As the bilge gremlin, except an object malfunctions on a roll of 4, 5, or 6.
  • Filth Dweller. The bilge gremlin is immune to disease.


  • Multiattack. The bilge gremlin bosun makes one Bite attack and two Makeshift Weapon attacks.
  • Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) piercing damage plus 5 (2d4) poison damage, and the target must succeed on a DC 13 Constitution saving throw or contract the sewer plague disease.
  • Makeshift Weapon. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 6 (1d6 + 3) bludgeoning, piercing, or slashing damage.


The blue-skinned creature hangs from the rigging, cackling with glee through pointed teeth as it flaps its fin-like ears. These aquatic fey resemble goblins with scaly, blue skin. When confronted, they use whatever is at hand to defend themselves.

Sinister Stowaways. Bilge gremlins can be found anywhere ships drop anchor, sneaking aboard and making themselves at home. They eat shipboard vermin, but this benefit is outweighed by their cruel pranks and the uncanny failure of mechanical devices in their presence.

Vile and Verminous. Sensing others of their kind, bilge gremlins often board infested ships passing through ports or over reefs. Disease, mishaps, and sabotage can lead crews to abandon ship, leaving the vessel adrift until someone investigates and unknowingly provides the gremlins with a new home.

Gremlin Leaders. If a population of bilge gremlins grows large enough, one bilge gremlin increases in size and power. These bosuns become the de facto leaders.

Section 15: Copyright Notice

Tome of Beasts 3 © 2022 Open Design LLC; Authors: Eytan Bernstein, Celeste Conowitch, Benjamin L. Eastman, Robert Fairbanks, Scott Gable, Basheer Ghouse, Richard Green, Jeremy Hochhalter, Jeff Lee, Christopher Lockey, Sarah Madsen, Ben Mcfarland, Jonathan Miley, Kelly Pawlik, Sebastian Rombach, Chelsea Steverson, Brian Suskind, Mike Welham

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