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Slaughterfish Swarm CR: 1/4

Medium swarm of tiny beasts, unaligned
Armor Class: 10
Hit Points: 24 (7d8-7) 7d8-7
Speed: 0 ft , swim: 40 ft

STR

9 -1

DEX

12 +1

CON

9 -1

INT

1 -5

WIS

10 +0

CHA

3 -4

Damage Resistances: Bludgeoning, Piercing and Slashing
Condition Immunities: Charmed, Frightened, Grappled, Paralyzed, Petrified, Prone, Restrained, Stunned
Senses: blindsight 10 ft, darkvision 30 ft, passive Perception 10
Challenge Rating: 1/4

Water Breathing. Slaughterfish can breathe only underwater.   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 slaughterfish. The swarm can't regain hit points or gain temporary hit points.  

Common Diseases

Roll 1d6 1d6 to determine a common disease.
(1) Ataxia. Pain grips the creature’s mind, and its skin turns milky white. The creature has disadvantage on Wisdom checks and Wisdom saving throws and is blinded.
(2) Rockjoint. A raging fever sweeps through the creature’s body. The creature has disadvantage on Strength checks, Strength saving throws, and attack rolls that use Strength.
(3) Whitbane. The creature’s flesh decays. The creature has disadvantage on Charisma checks and vulnerability to all damage.
(4) Brain Rot. The creature’s mind becomes feverish. The creature has disadvantage on Intelligence checks and Intelligence saving throws, and the creature behaves as if under the effects of the Confusion spell during combat.
(5) Rattles. The creature is overcome with shaking. The creature has disadvantage on Dexterity checks, Dexterity saving throws, and attack rolls that use Dexterity.
(6) Bone Break Fever. The creature begins to bleed uncontrollably. The creature has disadvantage on Constitution checks and Constitution saving throws. In addition, whenever the creature takes damage, it is stunned until the end of its next turn.

Actions

Bites (swarm has more than half HP). Melee Weapon Attack: +2 to hit, reach 0 ft., one target in the swarm's space. Hit: (2d6) piercing damage. If the target is a creature, it must succeed on a DC 10 Constitution saving throw or contract a disease.   Bites (swarm has half HP or less). Melee Weapon Attack: +2 to hit, reach 0 ft., one target in the swarm's space. Hit: (1d6) piercing damage. If the target is a creature, it must succeed on a DC 10 Constitution saving throw or contract a disease.


Created by

ShireLord.

Statblock Type

Monster

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