Death Butterfly Swarm, Greater

Family: Insects Rodents & Vermin

Huge swarm of tiny beasts, chaotic evil

Armor Class 15 (natural armor)
Hit Points 84 (13d12)
Speed 5 ft., fly 40 ft. (hover)

1 (-5) 16 (+3) 10 (+0) 1 (-5) 15 (+2) 12 (+1)

Damage Resistances bludgeoning, piercing, and slashing against nonmagical weapons
Damage Vulnerabilities cold, fire
Condition Immunities charmed, frightened, paralyzed, petrified, prone, restrained, petrified
Senses darkvision 60 ft., passive Perception 12
Challenge 6 (2,300 XP)

Special Traits

  • Potent Poison. As death butterfly swarm.
  • Swarm. As death butterfly swarm.
  • Weight of Wings. As death butterfly swarm but with DC 16 Dexterity saving throw


  • Multiattack. The swarm makes a Bite attack against every target in its spaces.
  • Bites. Melee Weapon Attack: +6 to hit, reach 0 ft., every target in the swarm’s space. Hit: 24 (6d6 +3) piercing damage, or 13 (3d6 + 3) piercing damage if the swarm has half of its hit points or fewer. The target also takes 17 (5d6) poison damage and becomes poisoned for 1d4 rounds; a successful DC 15 Constitution saving throw reduces poison damage by half and prevents the poisoned condition.


These enormous clouds of orange and green butterflies add a reek of putrefaction to the air, stirred by the flapping of their delicate wings.


Demon-Haunted. A death butterfly swarm results when a rare breed of carrion-eating butterflies, drawn to the stench of great decay, feeds on the corpse of a fiend, demon, or similar creature.

Dizzying and Poisonous. The colorful and chaotic flapping of the insects’ wings blinds and staggers those in its path, allowing the swarm to necrotize more flesh from those it overruns. Attracted to rotting material, the swarm spreads a fast-acting, poison on its victims, creating carrion it can feed on immediately.

Devour the Undead. Undead creatures are not immune to a death butterfly swarm’s poison, and a swarm can rot an undead creature’s animating energies as easily as those of the living. Given the choice between an undead and living creature, a death butterfly swarm always attacks the undead. Such swarms find ghouls and vampires particularly appealing. Some good-aligned forces regard summoning these swarms as a necessary evil.

Section 15: Copyright Notice

Tome of Beasts. Copyright 2016, Open Design; Authors Chris Harris, Dan Dillon, Rodrigo Garcia Carmona, and Wolfgang Baur.

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