Adamantine Wasp Swarm

Medium swarm of Tiny constructs, unaligned

Armor Class 16 (natural armor)
Hit Points 91 (14d8+28)
Speed 20 ft., fly 30 ft.

3 (-4) 13 (+1) 14 (+2) 1 (-5) 7 (-2) 1 (-5)

Damage Resistances bludgeoning, piercing, slashing
Damage Immunities bludgeoning, piercing, and slashing damage from nonmagical attacks that aren’t adamantine
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses blindsight 10 ft., passive Perception 8
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 insect. The swarm can’t regain hit points or gain temporary hit points.


  • Multiattack. The swarm makes 2 bites attacks.
  • Bites. Melee Weapon Attack: +5 to hit, reach 0 ft., one target in the swarm’s space. Hit: 40 (16d4) piercing damage, or 20 (8d4) piercing damage if the swarm has half of its hit points or fewer. Creatures who take damage from this attack must succeed on a DC 13 Constitution saving throw or be poisoned for 1d4 hours.


Adamantine wasps are used to guard or patrol areas the creator wishes to keep “off limits.” From a distance, they resemble 1-foot long silver wasps. Usually created by magic, the process has been duplicated by careful engineering; a mechanical swarm gains the technological subtype rather than the magical subtype. Whatever their origin, their creators often enhance the ruse that these creatures are natural insects by constructing fake nests nearby to detract would-be trespassers.

Metal Insects. An adamantine wasp is 1-foot long and looks like its namesake only made out of metal. Its body is segmented like a normal wasp (head, thorax, and abdomen) and has carefully and delicately been fitted together to form the wasp. A wicked-looking adamantine stinger protrudes from its abdomen. Its wings are formed of paper-thin adamantine, specially treated during the construction process.

Section 15: Copyright Notice

Mechanical Monsters (5E) © 2023, Legendary Games; Authors: Jason Nelson, Miguel Colon, Robert J. Grady, Nicholas Hite, Matt Kimmel, Michael Mifsud, James-Levi Cooke, Dan Dillon, Mike Myler, Ismael Alvarez, Jeff Lee, John Lynch.

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