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Swarm of Bladecoins

Family: Swarm

Large swarm of Tiny constructs, unaligned

Armor Class 14 (natural armor)
Hit Points 75 (10d10 + 20)
Speed 5 ft., fly 30 ft.

10 (+0) 15 (+2) 14 (+2) 3 (–4) 8 (–1) 1 (–5)

Skills Stealth +8
Damage Resistances acid, bludgeoning, piercing, slashing
Damage Immunities cold, poison, psychic
Condition Immunities blinded, charmed, deafened, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained, stunned
Senses blindsight 60 ft., passive Perception 9
Challenge 5 (1,800 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 bladecoin. The swarm can’t regain hit points or gain temporary hit points.
  • Distraction. A creature that starts its turn in the swarm’s space must succeed on a DC 14 Dexterity saving throw or be blinded and deafened until the start of its next turn.


  • Multiattack. The swarm makes two Slash attacks.
  • Slashes. Melee Weapon Attack: +5 to hit, reach 0 ft., one creature in the swarm’s space. Hit: 18 (4d8) slashing damage, or 9 (2d8) slashing damage if the swarm has half its hit points or fewer, and 4 (1d8) slashing damage at the end of its next turn.


A bladecoin swarm appears to be nothing more than a pile of brass or copper coins. However, when the swarm senses intruders entering the area it is tasked with guarding, it swirls upward into a cyclonic tornado composed of hundreds of coins with razor-sharp edges. The swarms are often placed to deter would-be thieves.

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