Lumenweaver Swarm

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Medium Monstrosity (swarm, light-eater), Neutral Evil

Armor Class 12 (natural armor)

Hit Points 52 (8d6+24)

Speed 20 ft. fly 60 ft.

STR 14 (+2)

DEX 18 (+4)

CON 14 (+2)

INT 10 (+0)

WIS 12 (+1)

CHA 4 (-3)

Saving Throws Dex +7, Con +5

Skills Stealth +7, Perception +4

Senses darkvision 60 ft., passive Perception 14

Languages Common, telepathy 60 ft.

Challenge 5 (1,800 XP) Proficiency Bonus +3

Light Drain (Recharge 5-6). The swarm feeds on magical light. If the swarm ends its turn in bright light, it regains 5 hit points.

Echolight Camouflage. While in dim light or darkness, the swarm has advantage on Stealth checks.

Actions

Multiattack. The swarm makes three attacks: two bites and one wing gust.

Bite. Melee weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) piercing damage. The swarm's needle-sharp mandibles bite through fabric and flesh.

Wing Gust. Melee weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d8+3) bludgeoning damage. Luminous wings slash the air, delivering a sharp gust that can stagger a foe.

Siphon Light. The swarm targets a magical light source within 60 feet and extinguishes it for 1 minute. If the light source is a spell or effect, that light is suppressed for the duration.

Environment Forest

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Lore & Description

Appearance

A translucent cloud of iridescent moths swirls in a shifting halo. Each moth's wingtip flickers with a soft inner glow, but the glow is not a mercy—it is sustenance. The swarm hunts in darkness and brightness alike, but it thrives when magical light fills the air, feeding on it until the glow falters and dims.

Behavior & Origins

Born from a moonlit grove's last spark, the Lumenweaver Swarm is a sentient collective of moths whose minds fuse into a single, shimmering intellect. They drift through forests, ruins, and caverns, drawn to any source of magic-light—lanterns, spells, or sun-silvered blades. To adventurers, they are a paradox: a creature of beauty and hunger that drains the glow from the world around it. Those who rely on light to see often become the moths' prey, for every spell of daylight or beacon they extinguish doubles as a meal for the swarm.

Generation Info

Original prompt:
"A swarm of sentient moths that eat magical light."

Created: Feb 2, 2026
Modified: May 22, 2026