Loomweaver, the Mirage Spinner

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Huge Monstrosity, Chaotic Evil

Armor Class 16 (natural armor)

Hit Points 152 (16d12+48)

Speed 30 ft. climb 40 ft.

STR 18 (+4)

DEX 14 (+2)

CON 17 (+3)

INT 10 (+0)

WIS 12 (+1)

CHA 6 (-2)

Saving Throws Con +6, Wis +4

Skills Stealth +5, Perception +4

Condition Immunities poisoned

Senses darkvision 60 ft., passive Perception 14

Languages —

Challenge 8 (3,900 XP) Proficiency Bonus +3

Keen Senses. The creature has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Magic Resistance. The Loomweaver has advantage on saving throws against spells and other magical effects.

Illusory Webs. The Loomweaver spins illusions that mimic webs. As an action, it can project a field of illusions in a 60-foot cube. Each creature in the area must make a DC 15 Wisdom saving throw or be frightened for 1 minute. A frightened target can repeat the save at the end of each of its turns, ending the effect on itself on a success. The area is considered light difficult terrain for affected creatures.

Innate Spellcasting. Loomweaver, the Mirage Spinner's spellcasting ability is Intelligence (spell save DC 11, +0 to hit with spell attacks). It can innately cast the following spells, Innate illusionary spellcasting; uses illusions to mislead and enthrall.:

1st level: shield

2nd level: mirror image

1/day each: major image

3/day each: mirror image, phantasmal force

At will: minor illusion

Cantrips (at will): minor illusion

Actions

Multiattack. The Loomweaver makes two attacks: one Bite and one Claw.

Bite. Melee weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8+4) piercing damage. The target must succeed on a DC 14 Constitution saving throw or be poisoned for 1 minute. The poison ends early on a successful saving throw.

Claw. Melee weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 11 (2d6+4) slashing damage.

Illusory Web. The Loomweaver projects a shimmering illusion that resembles the surface area of a web in a 60-foot cone. Each creature in the area must make a DC 15 Wisdom saving throw or be frightened for 1 round. A successful save ends the effect.

Environment Forest, Underdark

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Lore & Description

Appearance

A massive, iridescent spider whose carapace shifts colors like oil on water. Its legs are long and sinuous, ending in translucent claws that glimmer with inner light. Instead of weaving sticky webs, the Loomweaver spins motes of light and shadow into living illusions that mimic threads, traps, and paths. Its eyes gleam with misdirection, as if the world itself is a figment, and it moves with patient, unsettling grace as it threads fear and wonder through the minds of those who stumble into its lair.

Behavior & Origins

The Loomweaver is said to dwell in places where dream and waking life brush together—ruins overgrown with bioluminescent fungi, caves that echo with whispers, and forest clearings where the air seems just a fraction too thick with possibility. It feeds on confusion and fear, weaving illusions so convincing that travelers forget reality and follow phantoms toward imagined treasures or traps. Only those who keep their wits about them can pierce its masquerade long enough to strike true, for the Loomweaver’s true power lies in the stories it spins around its prey as much as in its venomous bite.

Generation Info

Original prompt:
"A massive spider that spins illusions instead of webs."

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