Wharfling Swarm — fantasy monster illustration. Wharfling Swarm is a large beast (Challenge Rating 4).

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Wharfling Swarm

Large Beast (Swarm), unaligned

AC
14
HP
63
Speed
30
CR
4

An undulating mass of flesh and teeth, a wharfling swarm is a horrific sight by moonlight.
Bloodthisty Mobs. These masses of hairless bodies writhe along the coast in the moonlight, and often are mistaken for shoggoths or other much larger creatures. Squeals mingle with the screams of unfortunate fishermen caught in its path.
Beach Swarms. Periodically, wharflings congregate in huge numbers and tear along the shoreline for miles before finally returning to their dens. Why they gather this way is unknown, but most locals know to avoid the shore on these nights.


Armor Class 14 (natural armor)

Hit Points 63 (14d10 - 14)

Speed 30 ft., climb 30 ft., swim 20 ft.


STR
10 (+0)
DEX
16 (+3)
CON
8 (-1)
INT
2 (-4)
WIS
12 (+1)
CHA
7 (-2)

Skills Perception +3

Damage Resistances bludgeoning, piercing, slashing

Condition Immunities charmed, frightened, paralyzed, petrified, prone, restrained, stunned

Senses darkvision 60 ft., passive Perception 13

Languages -

Challenge 4


Traits

Swarm. The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a tiny wharfling. The swarm can't regain hit points or gain temporary hit points.

Actions

Bites. Melee Weapon Attack: +5 to hit, reach 0 ft., one creature in the swarm's space. Hit: 21 (6d6) piercing damage, or 10 (3d6) piercing damage if the swarm has half of its hit points or fewer.

Locking Bite. When a creature leaves a wharfling swarm's space, 1d3 wharflings remain grappled to them (escape DC 10). Each wharfling inflicts 5 (1d4 + 3) piercing damage at the start of the creature's turns until it escapes from the grapples.

Pilfer. A wharfling swarm makes 1d6 Dexterity (Sleight of Hand) checks each round against every creature in the swarm's space. The DC for each check equals 10 plus the target creature's Dexterity modifier. For each successful check, the wharflings steal some small metallic object from the target, and the theft is unnoticed if the same result equals or exceeds the target's passive Perception.

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Wharfling Swarm — fantasy monster illustrationPrimary
FTTHelper · auto-generated · monster · monster

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Further reading

Jetpack7 Game Master Series
The Game Master's Book of Random Encounters
Jeff Ashworth · 2020
The Game Master's Book of Traps, Puzzles and Dungeons
Jeff Ashworth · 2022
The Game Master's Book of Legendary Dragons
Aaron Hübrich · 2022