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Swarm of Eye Spiders

Family: Swarm

Medium swarm of Tiny constructs, unaligned

Armor Class 13 (natural armor)
Hit Points 45 (10d8)
Speed 20 ft., climb 20 ft.

13 (+1) 13 (+1) 10 (+0) 1 (-5) 9 (-1) 3 (-4)

Damage Resistances bludgeoning, piercing, and slashing
Damage Immunities lightning, poison; bludgeoning, piercing, and slashing from nonmagical attacks that aren’t adamantine
Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned, prone, restrained, stunned
Senses darkvision 60 ft., passive Perception 9
Languages understands the language of its creator but can’t speak
Challenge 3 (700 XP)


  • Distraction. Any living creature that begins its turn with the swarm in its space must succeed on a DC 14 Constitution save or be frightened for one round.
  • Swarm. The swarm can occupy one or more other creatures’ spaces and vice versa, and the swarm can move through an opening large enough for a Tiny eye spider. The swarm can’t regain hit points or gain temporary hit points.


  • Slam. Melee Weapon Attack: +3 to hit, reach 0 ft., one creature in the swarm’s space. Hit: 4 (1d8) bludgeoning damage or 2 (1d4) bludgeoning damage if the swarm has half its starting hit points or fewer.


  • Mind Ruin. The swarm flashes and pulsates. Any creature caught within its space when it does so has its mind suddenly filled with thousands of tangled visual images composed of text, passages, and secrets that the eyes of the swarm have seen over the centuries. The creature must succeed on a DC 14 Wisdom saving throw or be confused, as if by a confusion spell. If the target fails three consecutive saving throws, the condition is permanent until cured by greater restoration or other magic.


Eye spiders are tiny constructs formed from eyeballs discarded by the scholars of the Great Repository in the City of Brass. They resemble spiders composed completely of eyeballs with a larger eye (presumably taken from a larger creature) serving as the monster’s central body. Small eyes that have been sewn, chained, or stitched together function as the creatures’ legs.

Section 15: Copyright Notice

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

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