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Swarm of Adamantine Wasps

Family: Swarm

Large swarm of Tiny constructs, unaligned

Armor Class 18 (natural armor)
Hit Points 133 (14d10 + 56)
Speed 5 ft., fly 40 ft.

14 (+2) 16 (+3) 19 (+4) 3 (–4) 8 (–1) 1 (–5)

Saving Throws Dex +7, Con +8
Skills Perception +3, Stealth +7
Damage Resistances bludgeoning, fire, piercing, slashing
Damage Immunities acid, cold, poison, psychic; bludgeoning, piercing, and slashing from nonmagical attacks
Condition Immunities blinded, charmed, deafened, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained, stunned
Senses blindsight 60 ft., passive Perception 13
Challenge 11 (7,200 XP)


  • 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 adamantine wasp. The swarm can’t regain hit points or gain temporary hit points.


  • Multiattack. The swarm makes two Icy Stingers attacks.
  • Icy Stingers. Melee Weapon Attack: +7 to hit, reach 0 ft., one creature in the swarm’s space. Hit: 14 (4d6) piercing damage, or 7 (2d6) piercing damage if the swarm has half of its hit points or fewer. The target must make a DC 17 Constitution saving throw, taking 18 (4d8) cold damage on a failed save, or half as much damage on a successful one. In addition, on a failed save the target gains a level of cold-based exhaustion.


Adamantine wasps are flying constructs with a deadly sting. They are one-foot-long silver wasps that often fly in swarms to bring down larger prey. The wasps are constructs created to guard or patrol areas. Their bodies are segmented like a normal wasp with a head, thorax, and abdomen, with its metallic pieces seamlessly fitted together. An adamantine stinger protrudes from the wasp’s abdomen. Its wings are formed of paper-thin adamantine. Their poison freezes the blood of those they sting. Adamantine wasps are non-intelligent and are programmed to carry out simple tasks that might include phrases such as “guard this room” or “attack any who enter.” The wasps fight until destroyed when performing their tasks.

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Tome of Horrors 2020, (C) 2020, Necromancer Games

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