Swarm of Dretches

Large Fiend (Demon), Chaotic Evil

AC: 12

Initiative: +0 (10)

HP: 45 (6d10 + 12)

Speed: 40 ft.

STR: 14 (+2)
DEX: 11 (+0)
CON: 14 (+2)
INT: 5 (-3)
WIS: 8 (-1)
CHA: 3 (-4)

Resistances: bludgeoning; cold; fire; lightning; piercing; slashing

Immunities: poison

Condition Immunities: charmed; frightened; grappled; paralyzed; petrified; poisoned; prone; restrained; stunned

Senses: Darkvision 60 ft., Passive Perception 9

Languages: Abyssal; telepathy 60 ft. (works only with creatures that understand Abyssal)

CR: 4 (XP 1,100; PB +2)

Habitat: Planar, Abyss

Fetid Aura.

Constitution Saving Throw: DC 12, any creature that starts its turn in a 10-foot Emanation originating from the swarm. Failure: The target has the Poisoned condition until the start of its next turn. While Poisoned, the target can take either an action or a Bonus Action on its turn, not both, and it can't take Reactions.

Swarm.

The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a Small creature. The swarm can't regain Hit Points or gain Temporary Hit Points.

Actions

Multiattack.

The swarm makes two Rend attacks.

Rend.

Melee Attack Roll: +4, reach 5 ft. Hit: 12 (3d6 + 2) Slashing damage, or 9 (3d4 + 2) Slashing damage if the swarm is Bloodied.

Find this creature in the encounter builder

Source: Monster Manual (2025), p. 104 - Licenses and attribution