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Damned Soul Swarm, Roiling

Family: Soul Swarm

Large swarm of Tiny undead, chaotic evil

Armor Class 14
Hit Points 85 (10d10 + 30)
Speed 0 ft, fly 30 ft. (hover)

3 (–4) 18 (+4) 16 (+3) 10 (+0) 12 (+1) 13 (+1)

Damage Vulnerabilities radiant
Damage Resistances bludgeoning, piercing, slashing
Damage Immunities necrotic, poison
Condition Immunities charmed, exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious
Senses blindsight 30 ft., darkvision 60 ft., passive Perception 11
Languages Abyssal, Common
Challenge 6 (2,300 XP)


  • Fiend Shroud. A fiend wholly within the swarm’s space is invisible. Incorporeal Movement. The swarm can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.
  • Life Sense. The swarm can only detect creatures other than constructs and undead with its blindsight ability. If blinded, it can’t detect anything other than these creatures within the range of its blindsight. Sneak Attack (1/turn). The swarm deals an extra 10 (3d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the swarm that isn’t incapacitated and the swarm doesn’t have disadvantage on the attack roll. Swarm. The swarm can occupy another creature’s space and vice versa. The swarm can’t regain hit points or gain temporary hit points.


  • Claws. Melee Weapon Attack: +7 to hit, reach 0 ft., one non-fiend target in the swarm’s space. Hit: 36 (8d8) slashing damage. Invisibility. The swarm magically becomes invisible until it attacks or until its concentration ends (as if concentrating on a spell).


Damned soul swarms that have fed on the vitality of many mortals, or whose constituent souls retain a strong sense of self, become large and cunning predators. These horrors resemble a churning cloud of scowling faces in a variety of colors that flicker through a numerous hues, allowing them to blend in with their surroundings or become altogether invisible. They enjoy engulfing several opponents at once, and can overwhelm the senses of those they rake with their spectral claws. This large cloud of ghostly claws and screaming faces shimmers in a variety of colors, like a swirl of oil on a rain puddle.

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