Small fey, chaotic neutral

Armor Class 16 (shell armor)
Hit Points 39 (6d6 + 18)
Speed 30 ft., swim 40 ft.

12 (+1) 16 (+3) 16 (+3) 10 (+0) 14 (+2) 14 (+2)

Skills Deception +4, Perception +4, Stealth +5
Damage Resistances cold
Senses darkvision 60 ft., passive Perception 14
Languages Common, Sylvan
Proficiency Bonus +2
Challenge 3 (700 XP)


  • Amphibious. The shellycoat can breathe air and water.
  • Fey Ancestry. The shellycoat has advantage on saving throws against being charmed, and magic can’t put it to sleep.
  • Keen Hearing. The shellycoat has advantage on Wisdom (Perception) checks that rely on hearing.
  • Mimicry. The shellycoat can mimic voices and sounds it has heard. A creature that hears the mimicry must succeed on a DC 12 Wisdom (Insight) check to discern what the sound is imitating.
  • Shell Rattle. The shells on the shellycoat’s body create a faint rattling sound up to 30 feet away when it moves. The shellycoat has disadvantage on Dexterity (Stealth) checks.
  • Ventriloquism. Whenever the shellycoat speaks, it can choose a point within 60 feet; the shellycoat’s voice emanates from that point.


  • Multiattack. The shellycoat makes two melee attacks: one with its bite and one with its claws.
  • Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage.
  • Claws. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) slashing damage.
  • Misleading Laughter. The shellycoat emits a haunting laughter that can distract and mislead creatures. Each creature of the shellycoat’s choice within 30 feet of it that can hear the laughter must succeed on a DC 12 Wisdom saving throw or it hears a faint laughter in its head for a moment and has disadvantage on its next attack roll, saving throw, or ability check. If the saving throw against Misleading Laughter fails by 5 or more, the creature is instead subjected to the confusion spell for 1 minute (no concentration required by the shellycoat). While under the effect of that confusion, the creature is immune to Misleading Laughter.


The shellycoat is a grotesque aquatic creature covered in a cloak and vest made of shells and barnacles. It has spindly limbs and claw-like fingers that are used to snatch its prey. Its eyes are pale and milky, adapted to seeing in the murkiness of underwater environments.

The shellycoat is a mischievous fey creature found in coastal regions, particularly around rivers. It is known for its distinctive coat of shells that create a faint rattling sound when it moves.

Shellycoats are considered relatively harmless, often misleading wanderers who trespass upon their territories. They have a mischievous nature and enjoy playing pranks on unsuspecting travelers. A common tactic of a shellycoat is to cry out as if drowning and then laugh at the distracted victim. They possess the ability to mimic voices and sounds they have heard, further contributing to their trickster reputation.

In combat, shellycoats prefer to use their misleading laughter and mimicry abilities to confuse and distract enemies. They rely on their agility and natural weaponry, such as their sharp claws and teeth, if they need to defend themselves. Despite their mischievous nature, shellycoats are not inherently malevolent and rarely cause serious harm to creatures they encounter.

Section 15: Copyright Notice

5E RPG: Celtic Bestiary. Copyright 2023, Mal and Tal Enterprises, LLC; Author Michael Tresca.

This is not the complete section 15 entry - see the full license for this page