Medium aberration, unaligned

Armor Class 16 (natural armor)
Hit Points 97 (13d8 + 39)
Speed 0 ft., fly 30 ft. (hover)

10 (+0) 18 (+4) 16 (+3) 1 (–5) 16 (+3) 6 (–2)

Skills Perception +6, Stealth +7
Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities poison, psychic
Condition Immunities blinded, charmed, deafened, exhaustion, frightened, poisoned, prone
Senses blindsight 120 ft. (blind beyond this radius), passive Perception 16
Challenge 6 (2,300 XP)
Proficiency Bonus +3


  • Alien Nature. The moonweb doesn’t require air or sleep.
  • Transparent. A moonweb has advantage on Dexterity (Stealth) checks while motionless or in dim light.


    • Multiattack. The moonweb makes one Dissolving Bite attack and one Tendrils attack.

Dissolving Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 13 (2d8 + 4) piercing damage plus 9 (2d8) acid damage, and the moonweb regains hp equal to the acid damage dealt.

Tendrils. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage, and the target must succeed on a DC 14 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Etheric Pulse (Recharge 6). The moonweb releases a burst of ethereal energy. Each creature within 30 feet of the moonweb must succeed on a DC 14 Constitution saving throw or become partially ethereal. A partially ethereal creature’s attacks deal normal damage to the moonweb, even if the attacks are nonmagical, but all other creatures have resistance to the partially ethereal creature’s nonmagical damage. In addition, the moonweb can pinpoint the location of the partially ethereal creature, and the moonweb has advantage on attack rolls against the creature. A partially ethereal creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.


  • Ethereal Jaunt. The moonweb magically shifts from the Material Plane to the Ethereal Plane, or vice versa.


A transparent, nearly invisible mass floats like a cloud in the sky, trailing numerous questing tendrils.

Predators from the Ethereal Plane, moonwebs can travel between planes when the moon is full. Even those able to see invisibility can only partially perceive the form of the moonweb, which resembles an ethereal jellyfish with an amorphous mass and long tendrils dangling below. It has no brain, depending on automatic reflexes in response to stimuli.

Ambush Hunters. Moonwebs drift into the Material Plane during each full moon to hunt, returning to the Ethereal Plane as the moon sets. While hunting, a moonweb floats silently overhead until a suitable target passes below, whereupon it descends and wraps its tentacles around its prey. Hair-fine threads from the tendrils pierce the victim’s flesh and paralyze it, leaving it to struggle weakly as the moonweb slowly dissolves it.

Section 15: Copyright Notice

Tome of Beasts 3 © 2022 Open Design LLC; Authors: Eytan Bernstein, Celeste Conowitch, Benjamin L. Eastman, Robert Fairbanks, Scott Gable, Basheer Ghouse, Richard Green, Jeremy Hochhalter, Jeff Lee, Christopher Lockey, Sarah Madsen, Ben Mcfarland, Jonathan Miley, Kelly Pawlik, Sebastian Rombach, Chelsea Steverson, Brian Suskind, Mike Welham

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